Ink test printing device

Abstract

The utility model relates to an ink test printing device, which comprises a frame unit, a machine head unit and an ink box unit, the frame unit is provided with a cross beam unit and a guide beam unit, the machine head unit is arranged on the guide beam unit and is arranged on a machine head frame supporting piece of the frame unit and the cross beam unit in a crossing manner, and the cross beam unit is provided with an ink box. The ink box unit is arranged on the machine head unit and can synchronously move up and down along with the machine head unit; the ink box unit comprises an ink box stand column arranged on the machine head unit, an ink box body which is arranged on the ink box stand column and can ascend and descend vertically relative to the ink box stand column, and a liquid level monitoring unit which is arranged on the ink box stand column and used for monitoring the liquid level of ink in the ink box body. And the height of the ink box body is adjusted according to the change of the liquid level in the ink box body monitored by the liquid level monitoring unit, so that the ink at the nozzle is subjected to constant or basically constant negative pressure. According to the utility model, a negative pressure device is not needed, the angle of the machine head bottom plate can be finely adjusted so as to adjust the angle of the nozzle, and the downward movement of the machine head bottom plate can be guided and positioned.

Description

Technical Field

[0001] This utility model relates to the field of inkjet printers, and more specifically to an ink testing and printing device. Background Technology

[0002] An inkjet printer is a printing device that uses micro-nozzles to spray liquid ink onto paper or other media to form text or images. Its working principle is to convert colored ink into tiny droplets to achieve full-color output, supporting high-resolution, high-precision color printing. Typically, an inkjet printer's print carriage contains a secondary ink cartridge and a printhead. The secondary ink cartridge is connected to the main ink cartridge to replenish its ink. The secondary ink cartridge is primarily used to reduce the weight of the print carriage, as an overly heavy carriage can affect printing accuracy. Because the secondary ink cartridge is higher than the printhead, there is a level difference between the ink in the secondary cartridge and the ink at the printhead. This level difference causes ink in the secondary cartridge to drip from the printhead, affecting print quality. To solve this problem, a negative pressure device is connected to the secondary ink cartridge. This device counteracts the positive pressure caused by the level difference, creating a concave surface for the ink droplets at the printhead and ensuring a constant negative pressure for ink to flow through the printhead. Because the ink level in the secondary ink cartridge is constantly changing, the negative pressure generated by the negative pressure device needs to be adjusted continuously. However, adjusting the negative pressure device is complex and expensive. For large industrial inkjet printers, a negative pressure device is essential. But for inkjet printers used for ink testing, the test ink is sealed in a cartridge with its own negative pressure. Once a cartridge is empty, the test is essentially complete, so there's no need to refill the main cartridge. While stabilizing the negative pressure of the test ink using a negative pressure device is feasible, it increases the complexity of operation and the cost of the equipment. Furthermore, to ensure printing accuracy and quality, the printhead must be parallel to the printing media. The printhead is mounted on the base plate, so the base plate must also be parallel to the printing media. However, due to factors such as manufacturing precision, the weight of the printing carriage, and height adjustments, the base plate may tilt slightly. In this case, the angle of the printhead or the base plate needs to be adjusted. Adjusting each printhead individually is time-consuming, labor-intensive, and difficult to maintain uniformity. Therefore, adjusting the entire base plate while ensuring the printhead mounting accuracy is a simple and effective method. Furthermore, inkjet printers are prone to printhead clogging when idle for extended periods, leading to higher ink consumption costs. A common solution is to cover the bottom of the printhead with an end cap. However, during printing, the printhead is close to the printing media, requiring the base plate to be raised to provide space for the printhead when the end cap is applied. When printing again, the end cap is removed and the base plate is lowered to bring the printhead closer to the printing media, but due to the lack of a positioning and limiting device, deviations can easily occur when the base plate is lowered.

[0003] In view of this, the present invention provides an ink testing and printing device, which monitors the ink level in the ink cartridge in real time through a liquid level detection unit and adjusts the height of the ink cartridge body so that the ink at the printhead is subjected to a basically constant negative pressure, thus eliminating the need for a negative pressure device. By suspending the base plate and cooperating with the ball head screw, the downward pressure generated when the cylinder contracts is used to press the suspended base plate against the ball head screw, thereby achieving the purpose of fine adjustment of the base plate angle. Furthermore, by setting a positioning pin on the positioning plate and setting a strip hole on the base plate, the base plate is guided to descend to the correct position. Utility Model Content

[0004] The present invention aims to provide an ink testing and printing device to address the shortcomings of the existing technology. The technical problem to be solved by the present invention is achieved through the following technical solution.

[0005] An ink testing printing device includes a frame unit, a printhead unit, and an ink cartridge unit. The improvement lies in that: the frame unit is equipped with a crossbeam unit and a guide beam unit; the printhead unit is mounted on the guide beam unit and spans the printhead frame support and the crossbeam unit of the frame unit; the ink cartridge unit is mounted on the printhead unit and can move up and down synchronously with the printhead unit; the ink cartridge unit includes an ink cartridge column mounted on the printhead unit, an ink cartridge body mounted on the ink cartridge column and capable of vertically moving relative to the ink cartridge column, and a liquid level monitoring unit mounted on the ink cartridge column for monitoring the ink level within the ink cartridge body. The height of the ink cartridge body is adjusted according to the changes in the ink level within the ink cartridge body monitored by the liquid level monitoring unit to ensure that the ink at the printhead experiences a constant or substantially constant negative pressure.

[0006] Preferably, the ink cartridge unit further includes an ink cartridge slide on the ink cartridge column, an ink cartridge motor and an ink cartridge screw on the ink cartridge slide, an ink cartridge slider screwed to the ink cartridge screw, and an ink cartridge mounting base on the ink cartridge slider. The ink cartridge body is mounted on the ink cartridge mounting base. The ink cartridge motor drives the ink cartridge screw to rotate, thereby causing the ink cartridge slider and the ink cartridge mounting base to move up and down to adjust the height of the ink cartridge body.

[0007] Preferably, the liquid level monitoring unit includes a slide rod mounting base on the ink cartridge column, a switch slide rod on the slide rod mounting base, a switch slide table on the switch slide rod, a proximity switch base on the switch slide table, and a proximity switch on the proximity switch base. The proximity switch is used to monitor the position of the ink level inside the ink cartridge.

[0008] Preferably, the head unit includes a head cylinder and a head side plate connected to and driven by the head cylinder to move up and down. The lower part of the head side plate has a through hole, and a plug screw slides through the through hole. The lower end of the plug screw passes through the head side plate and is fixed to the head base plate. A compression spring is sleeved on the plug screw, and the compression spring is located between the head side plate and the head base plate. The head frame support is provided with a head frame positioning plate, and the head beam support of the crossbeam unit is provided with a head beam positioning plate. Both the head beam positioning plate and the head frame positioning plate are provided with ball head set screws, and the number of ball head set screws is not less than three. The head cylinder drives the head base plate down to the lower surface of the head base plate to abut against some of the ball head set screws and continues to move down so that the lower surface of the head base plate abuts against all of the ball head set screws.

[0009] Preferably, the head unit further includes a head back plate, which is fixed to the cylinder extension part of the head cylinder, and the head side plate is disposed on the head back plate.

[0010] Preferably, the head cylinder is mounted on the head guide beam slide of the guide beam unit, and the head guide beam slide is provided with a head guide beam slider. The head guide beam slider cooperates with the head guide beam slide rail of the guide beam unit to realize the movement of the head unit relative to the guide beam unit.

[0011] Preferably, the head guide beam slide is provided with a head guide beam fixing component, and the head unit is fixed relative to the guide beam unit through the head guide beam fixing component.

[0012] Preferably, the number of the drive screws is at least four, and the at least four drive screws are located at at least the four corners of the machine head base plate.

[0013] Preferably, the ink cartridge support column is mounted on the bottom plate of the printer head.

[0014] Preferably, the machine head frame positioning plate is provided with a positioning pin, and the machine head bottom plate is provided with a strip hole that matches the positioning pin. The positioning pin and the strip hole cooperate to guide and position the downward movement of the machine head bottom plate.

[0015] In this invention, the liquid level monitoring unit monitors changes in the ink level within the ink cartridge and adjusts the height of the cartridge body, thereby maintaining a constant or nearly constant height difference between the ink level at the printhead and the ink level within the cartridge body. This, in turn, maintains a constant or nearly constant negative pressure on the ink at the printhead, eliminating the need for a separate negative pressure device. The printhead cylinder drives the printhead side plate and printhead base plate to rise and fall, providing space for adding the end cap. The printhead base plate is suspended from the printhead side plate by screws and springs, providing adjustment space for fine-tuning. At least three ball-head set screws define the plane. The printhead cylinder descends, and the springs ensure that the lower surface of the printhead base plate fully contacts the highest points of all the ball-head set screws, thus achieving the purpose of fine-tuning the angle of the printhead base plate. This invention guides and positions the downward movement of the printhead base plate by using positioning pins and slotted holes. This invention can fine-tune the angle of the nozzle base plate to adjust the nozzle angle, and can guide and position the downward movement of the nozzle base plate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the head unit in this utility model;

[0018] Figure 3 This is a front view structural diagram of the print head unit and ink cartridge unit in this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the print head unit and ink cartridge unit in this utility model;

[0020] The reference numerals in the attached figures are, in order: 10, frame unit; 11, head frame support; 12, head frame positioning plate; 20, crossbeam unit; 21, head crossbeam support; 22, head crossbeam positioning plate; 30, guide beam unit; 31, head guide beam slide; 32, head guide beam slider; 33, head guide beam slide rail; 34, head guide beam fixing component; 40, head unit; 41, head cylinder; 411, cylinder fixing part; 412, cylinder telescopic part; 42, head back plate; 43, head side plate; 44, head. Base plate, 45. Insert screw, 46. Compression spring, 47. Ball head set screw, 48. Positioning pin, 49. Printhead, 50. Ink cartridge unit, 51. Ink cartridge body, 52. Ink cartridge mounting base, 53. Ink cartridge slider, 54. Ink cartridge screw, 55. Ink cartridge motor, 56. Ink cartridge slide, 57. Ink cartridge column, 58. Liquid level monitoring unit, 581. Proximity switch, 582. Proximity switch base, 583. Switch slide, 584. Switch slide rod, 585. Slide rod mounting base, 60. UV lamp unit, 70. Media delivery unit. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] Example 1:

[0023] Reference Figures 1 to 4 As shown, an ink testing printing device includes a frame unit 10, a printhead unit 40, and an ink cartridge unit 50. The improvement lies in that: the frame unit 10 is provided with a crossbeam unit 20 and a guide beam unit 30; the printhead unit 40 is disposed on the guide beam unit 30 and spans the printhead frame support 11 of the frame unit 10 and the crossbeam unit 20; the ink cartridge unit 50 is disposed on the printhead unit 40 and can move up and down synchronously with the printhead unit 40; the ink cartridge unit 50... The unit 50 includes an ink cartridge support column 57 mounted on the printhead unit 40, an ink cartridge body 51 mounted on the ink cartridge support column 57 and capable of moving up and down relative to the ink cartridge support column 57, and a liquid level monitoring unit 58 mounted on the ink cartridge support column 57 for monitoring the ink level inside the ink cartridge body 51. The unit adjusts the height of the ink cartridge body 51 according to the changes in the liquid level inside the ink cartridge body 51 monitored by the liquid level monitoring unit 58 so that the ink at the printhead 49 is subjected to a constant or substantially constant negative pressure.

[0024] In this embodiment, the liquid level monitoring unit 58 monitors changes in the ink level within the ink cartridge body 51 and adjusts the height of the ink cartridge body 51 accordingly. This ensures that the height difference between the ink at the printhead 49 and the ink level within the ink cartridge body 51 remains constant or substantially constant, thereby maintaining a constant or substantially constant negative pressure on the ink at the printhead 49. Consequently, no additional negative pressure device is required. This reduces operational complexity and equipment cost.

[0025] Furthermore, it also includes a media conveying unit 70 and a UV lamp unit 60. The media conveying unit 70 is disposed on the crossbeam unit 20 and can slide relative to the crossbeam unit 20. The UV lamp unit 60 is disposed on the guide beam unit 30 and located between adjacent machine head units 40.

[0026] Furthermore, the crossbeam unit 20 includes a head crossbeam support 21, and the head unit 40 is mounted on the head crossbeam support 21.

[0027] Furthermore, the ink cartridge unit 50 also includes an ink cartridge slide 56 mounted on the ink cartridge column 57, an ink cartridge motor 55 and an ink cartridge screw 54 mounted on the ink cartridge slide 56, an ink cartridge slider 53 screwed onto the ink cartridge screw 54, and an ink cartridge mounting base 52 mounted on the ink cartridge slider 53. The ink cartridge body 51 is mounted on the ink cartridge mounting base 52. The ink cartridge motor 55 drives the ink cartridge screw 54 to rotate, thereby causing the ink cartridge slider 53 and the ink cartridge mounting base 52 to move up and down, thereby adjusting the height of the ink cartridge body 51.

[0028] In this embodiment, the ink cartridge slide 56 is fixed to the ink cartridge column 57 by screws. At the same time, the ink cartridge column 57 is also provided with multiple screw holes. When it is necessary to adjust the height of the ink cartridge slide 56 relative to the ink cartridge column 57, the screws can be unscrewed to install the ink cartridge slide 56 in a suitable position and then the screws can be tightened again. Thus, the height of the ink cartridge body 51 can be manually adjusted according to the characteristics of different inks, that is, the initial height of the ink level in the ink cartridge body 51 can be manually adjusted. During printing testing, based on the drop in ink level in the ink cartridge body 51 monitored by the ink level monitoring unit 58, the ink cartridge motor 55 drives the ink cartridge screw 54 to rotate. The ink cartridge slider 53, screwed onto the ink cartridge screw 54, moves upward, causing the ink cartridge mounting base 52 and the ink cartridge body 51 mounted on the ink cartridge mounting base 52 to move upward. This raises the ink level in the ink cartridge body 51 to counteract the change in negative pressure on the ink at the printhead 49 caused by the drop in ink level, thus maintaining a constant or nearly constant negative pressure on the ink at the printhead 49. In other words, by raising the height of the ink cartridge body 51, the stability of the negative pressure on the ink at the printhead is maintained, eliminating the need for a separate negative pressure device, thereby reducing operational complexity and equipment cost.

[0029] Furthermore, the liquid level monitoring unit 58 includes a slide rod mounting base 585 disposed on the ink cartridge column 57, a switch slide rod 584 disposed on the slide rod mounting base 585, a switch slide 583 disposed on the switch slide rod 584, a proximity switch base 582 disposed on the switch slide 583, and a proximity switch 581 disposed on the proximity switch base 582. The proximity switch 581 is used to monitor the position of the ink liquid level inside the ink cartridge body 51.

[0030] In this embodiment, the slide rod mounting base 585 is fixed to the ink cartridge column 57 with screws. The ink cartridge column 57 also has multiple pre-drilled screw holes, allowing adjustment of the mounting position of the slide rod mounting base 585 using the screws and screw holes. The switch slide 583 is fixed to the ink cartridge column 57 with screws to maintain the relative fixation between the switch slide 583 and the switch slide rod 584. When adjusting the position of the switch slide 583, loosen the screws, move the switch slide 583 along the switch slide rod 584 to a suitable position, and then tighten the screws. The proximity switch base 582 on the switch slide 583 and the proximity switch 581 on the proximity switch base 582 are adjusted to suitable positions. The slide rod mounting base 585 and the switch slide 583 provide the largest possible stroke for adjusting the height of the proximity switch 581, thereby meeting the testing requirements of inks with different characteristics. The proximity switch 581 is used to monitor the position of the ink level inside the ink cartridge body 51. When the ink level drops, the proximity switch 581 sends a signal, the ink cartridge motor 55 starts and drives the ink cartridge screw 54 to rotate, thereby driving the ink cartridge slider 53, ink cartridge mounting base 52 and ink cartridge body 51 to move upward and thus raise the height of the ink level. When the proximity switch 581 detects the ink level again, the proximity switch 581 sends a signal again, and the ink cartridge motor 55 stops. This process is repeated to keep the ink level at basically the same height, thereby ensuring that the ink at the printhead 49 is subjected to a constant or basically constant negative pressure.

[0031] Example 2:

[0032] Based on Example 1, referring to Figures 2 to 4 As shown, the head unit 40 includes a head cylinder 41 and a head side plate 43 connected to and driven by the head cylinder 41 to move up and down. The lower part of the head side plate 43 has a through hole, and a plug screw 45 slides through the through hole. The lower end of the plug screw 45 passes through the head side plate 43 and is fixed to the head base plate 44. A compression spring 46 is sleeved on the plug screw 45, and the compression spring 46 is located between the head side plate 43 and the head base plate 44. The head frame support 11 is provided with a head frame positioning plate 12, and the crossbeam... The machine head beam support member 21 of unit 20 is provided with a machine head beam positioning plate 22. Both the machine head beam positioning plate 22 and the machine head frame positioning plate 12 are provided with ball head set screws 47, and the number of ball head set screws 47 is not less than three. The machine head cylinder 41 drives the machine head base plate 44 to move down to the lower surface of the machine head base plate 44 and abut against some of the ball head set screws 47 and continue to move down. The pressure of the machine head cylinder 41 moving down is transmitted to the machine head base plate 44 through the compression spring 46 so that the lower surface of the machine head base plate 44 abuts against all of the ball head set screws 47.

[0033] In this embodiment, the head cylinder 41 drives the head side plate 43 and the head base plate 44 to rise and fall, thereby providing space for adding the end cap; the head base plate 44 is suspended on the head side plate 43 by a plug screw 45 and a compression spring 46, providing adjustment space for fine-tuning of the head base plate 44 by suspension; at least three ball head set screws 47 define the plane, and the head cylinder 41 moves downward and uses the compression spring 46 to make the lower surface of the head base plate 44 completely abut against the highest point of all the ball head set screws 47, thereby achieving the purpose of fine-tuning the angle of the head base plate 44.

[0034] In this embodiment, during operation, the head cylinder 41 moves downward, driving the head base plate 44 downward. When the head base plate 44 is slightly tilted, its lower surface first contacts a portion of the ball-head setter screws 47 during the downward movement. At this point, the contact point is not at the highest point of the ball-head setter screws 47. As the head cylinder 41 continues to move downward, the tilted portion of the head base plate 44 contacts other ball-head setter screws 47 under the action of the head cylinder 41 and the pressure of the compression spring 46. The portion of the head base plate 44 that has already contacted the ball-head setter screws 47 then compresses the compression spring 46 until the lower surface of the head base plate 44 contacts all the ball-head setter screws 47. At this point, the contact point is at the highest point of the ball-head setter screws 47. Based on the principle that three points determine a plane, at least three ball-head ejector screws 47 can determine a plane. After the print head cylinder 41 moves downward so that the lower surface of the print head base plate 44 abuts against all the ball-head ejector screws 47, the plane where the print head base plate 44 is located is parallel to the plane where all the ball-head ejector screws 47 are located. Under the premise that the plane where all the ball-head ejector screws 47 are located is parallel to the plane where the printing medium is located, and the plane where the print head base plate 44 is located is parallel to the plane where the print head 49 is located, the planes where the print head base plate 44 and the print head 49 are located are both parallel to the plane where the printing medium is located, thereby achieving the purpose of adjusting the tilt angle of the print head.

[0035] In this embodiment, the machine head base plate 44 is suspended on the machine head side plate 43 by the stop screw 45 and the compression spring 46. The downward pressure of the machine head cylinder 41 causes the machine head base plate 44 to press against all the ball head set screws 47, thereby achieving the purpose of fine adjustment of the machine head base plate 44.

[0036] Furthermore, the head frame positioning plate 12 is provided with a positioning pin 48, and the head base plate 44 is provided with a strip hole that matches the positioning pin 48. The downward movement of the head base plate 44 is guided and positioned by the cooperation between the positioning pin 48 and the strip hole.

[0037] In this embodiment, the downward movement of the machine head base plate 44 is guided and positioned by setting the positioning pin 48 and the strip hole.

[0038] Furthermore, the number of the screws 45 is at least four, and the at least four screws 45 are provided at at least the four corners of the machine head base plate 44.

[0039] Furthermore, the upper end of the compression spring 46 may or may not be connected to the lower surface of the machine head side plate 45, and the lower end of the compression spring 46 may or may not be connected to the upper surface of the machine head base plate 44.

[0040] Furthermore, the head frame positioning plate 12 is disposed on the head frame support member 11 of the frame unit 10.

[0041] Furthermore, the head beam positioning plate 22 is disposed on the head beam support member 21 of the beam unit 20.

[0042] Furthermore, the ink cartridge support column 57 is mounted on the printhead base plate 44. In this embodiment, the cylinder extension part 412 of the printhead cylinder 41 drives the printhead back plate 42 to move up and down, the printhead back plate 42 drives the printhead side plate 43 and the printhead base plate 44 to move up and down, and the printhead base plate 44 pushes the ink cartridge support column 57 to move up and down. The ink cartridge body 51 and the proximity switch 581 mounted on the ink cartridge support column 57 move up and down synchronously, thereby realizing the synchronous up and down movement of the ink cartridge unit 50 and the printhead unit 40. Meanwhile, since the connection between the printhead base plate 44 and the printhead side plate 43 is achieved by using the screw 45 and the spring 46, that is, the printhead base plate 44 is connected to the printhead side plate 43 by means of suspension, during the process of the printhead base plate 44 contacting all the ball head set screws 47, that is, when the printhead base plate 44 is slightly adjusted in tilt angle, the relative height between the printhead base plate 44 and the printhead side plate 43, the printhead back plate 42 and the printhead cylinder 41 will change slightly. By setting the ink cartridge column 57 on the printhead base plate 44 instead of on other parts, it can be ensured that the height difference between the ink at the printhead 49 and the ink liquid level in the ink cartridge body 51 remains constant, thereby ensuring as much as possible that the negative pressure on the ink at the printhead is constant or basically constant.

[0043] Furthermore, the head unit 40 also includes a head back plate 42, which is fixed to the cylinder extension part 412 of the head cylinder 41, and the head side plate 43 is disposed on the head back plate 42.

[0044] In this embodiment, the machine head side plate 43 is connected to the machine head cylinder 41 through the machine head back plate 42 and is driven to move up and down by the machine head cylinder 41. The machine head side plate 43 drives the machine head base plate 44 to move up and down through the plug screw 45 and transmits the pressure of the downward movement of the machine head cylinder 41 to the machine head base plate 44 through the compression spring 46, thereby enabling the machine head base plate 44 to adaptively adjust its tilt angle under the reverse push of the ball head set screw 47.

[0045] Furthermore, the head cylinder 41 is mounted on the head guide beam slide 31 of the guide beam unit 30; even further, the cylinder fixing part 411 of the head cylinder 41 is mounted on the head guide beam slide 31.

[0046] Furthermore, the head guide beam slide block 31 is provided with a head guide beam slider 32, which cooperates with the head guide beam slide rail 33 of the guide beam unit 30 to realize the movement of the head unit 40 relative to the guide beam unit 30.

[0047] Furthermore, the head guide beam slide 31 is provided with a head guide beam fixing member 34, and the head unit 40 is fixed relative to the guide beam unit 30 through the head guide beam fixing member 34.

[0048] In this embodiment, the movement of the printhead unit 40 relative to the guide beam unit 30 is achieved by setting the printhead guide beam slide 31, the printhead guide beam slider 32, and the printhead guide beam slide rail 33, and the fixation of the printhead unit 40 relative to the guide beam unit 30 is achieved by setting the printhead guide beam fixing member 34. The reason for moving the printhead unit 40 is that in actual use, it is necessary to adjust the distance between adjacent printheads and between the printhead and the UV lamp unit to adapt to different types of ink, different colors of ink, and the requirements of irradiation time.

[0049] It should be noted that the above detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, 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 application pertains.

[0050] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments described in this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0051] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0052] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0053] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, such as rotated 90 degrees or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0054] In the detailed description above, reference has been made to the accompanying drawings, which form part of this document. In the drawings, similar symbols typically identify similar parts unless the context otherwise indicates otherwise. The illustrated embodiments described in the detailed specification, drawings, and claims are not intended to be limiting. Other embodiments may be used and other changes may be made without departing from the spirit or scope of the subject matter presented herein.

[0055] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An ink test printing apparatus comprising a frame unit (10), a head unit (40), an ink cartridge unit (50), characterized by: The frame unit (10) is provided with a crossbeam unit (20) and a guide beam unit (30). The head unit (40) is disposed on the guide beam unit (30) and spans the head frame support (11) of the frame unit (10) and the crossbeam unit (20). The ink cartridge unit (50) is disposed on the head unit (40) and can move up and down synchronously with the head unit (40). The ink cartridge unit (50) includes an ink cartridge stand disposed on the head unit (40). The column (57), the ink cartridge body (51) mounted on the ink cartridge column (57) and capable of moving up and down relative to the ink cartridge column (57), and the liquid level monitoring unit (58) mounted on the ink cartridge column (57) for monitoring the ink level inside the ink cartridge body (51), adjust the height of the ink cartridge body (51) according to the changes in the liquid level inside the ink cartridge body (51) monitored by the liquid level monitoring unit (58) so that the ink at the print head (49) is subjected to a constant or substantially constant negative pressure.

2. An ink test printing device according to claim 1, characterized in that: The ink cartridge unit (50) further includes an ink cartridge slide (56) mounted on the ink cartridge column (57), an ink cartridge motor (55) and an ink cartridge screw (54) mounted on the ink cartridge slide (56), an ink cartridge slider (53) screwed onto the ink cartridge screw (54), and an ink cartridge mounting base (52) mounted on the ink cartridge slider (53). The ink cartridge body (51) is mounted on the ink cartridge mounting base (52). The ink cartridge motor (55) drives the ink cartridge screw (54) to rotate, thereby driving the ink cartridge slider (53) and the ink cartridge mounting base (52) to move up and down, thereby adjusting the height of the ink cartridge body (51).

3. An ink test printing device as claimed in claim 1, characterized in that: The liquid level monitoring unit (58) includes a slide rod mounting base (585) on the ink cartridge column (57), a switch slide rod (584) on the slide rod mounting base (585), a switch slide table (583) on the switch slide rod (584), a proximity switch base (582) on the switch slide table (583), and a proximity switch (581) on the proximity switch base (582). The proximity switch (581) is used to monitor the position of the ink level inside the ink cartridge body (51).

4. An ink test printing device as claimed in claim 1, characterized in that: The head unit (40) includes a head cylinder (41) and a head side plate (43) connected to the head cylinder (41) and driven by the head cylinder (41) to move up and down. The lower part of the head side plate (43) is provided with a through hole and a plug screw (45) slides through the through hole. The lower end of the plug screw (45) passes through the head side plate (43) and is fixed to the head base plate (44). A compression spring (46) is sleeved on the plug screw (45). The compression spring (46) is located between the head side plate (43) and the head base plate (44). The head frame support (11) The machine head frame positioning plate (12) is provided on the machine head frame positioning plate (22), and the machine head beam support member (21) of the crossbeam unit (20) is provided with a machine head beam positioning plate (22). Both the machine head beam positioning plate (22) and the machine head frame positioning plate (12) are provided with ball head set screws (47), and the number of ball head set screws (47) is not less than three. The machine head cylinder (41) drives the machine head base plate (44) to descend to the lower surface of the machine head base plate (44) and abut against some of the ball head set screws (47) and continue to descend so that the lower surface of the machine head base plate (44) abuts against all of the ball head set screws (47).

5. The ink testing and printing device according to claim 4, characterized in that: The head unit (40) also includes a head back plate (42), which is fixed to the cylinder extension part (412) of the head cylinder (41), and the head side plate (43) is disposed on the head back plate (42).

6. An ink test printing device as claimed in claim 4, characterized in that: The head cylinder (41) is mounted on the head guide beam slide (31) of the guide beam unit (30). The head guide beam slide (31) is provided with a head guide beam slider (32). The head guide beam slider (32) cooperates with the head guide beam slide rail (33) of the guide beam unit (30) to realize the movement of the head unit (40) relative to the guide beam unit (30).

7. An ink test printing device according to claim 6, wherein: The head guide beam slide (31) is provided with a head guide beam fixing member (34), and the head unit (40) is fixed relative to the guide beam unit (30) through the head guide beam fixing member (34).

8. An ink test printing device as claimed in claim 4, characterized in that: The number of the screws (45) is at least four, and the at least four screws (45) are located at at least the four corners of the machine head base plate (44).

9. An ink test printing device as claimed in claim 4, characterized in that: The ink cartridge support column (57) is mounted on the printer head base plate (44).

10. An ink test printing apparatus according to claim 4, characterized by: The head frame positioning plate (12) is provided with a positioning pin (48), and the head base plate (44) is provided with a strip hole that matches the positioning pin (48). The positioning pin (48) and the strip hole cooperate to guide and position the downward movement of the head base plate (44).

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