A nozzle collision prevention device and a droplet observation device

Abstract

The application discloses a nozzle anti-collision device and a droplet observation device. The nozzle anti-collision device is applied to a droplet observation device. An ink cartridge in the droplet observation device is located between a first droplet observation unit and a second droplet observation unit. The first droplet observation unit and the second droplet observation unit are oppositely arranged. A first sensor group is arranged in the length direction of the first droplet observation unit. The first droplet observation unit is located between two sensors of the first sensor group. The distance between the center points of the two sensors in the first sensor group is less than the length of a nozzle of an inkjet printer. A second sensor group is arranged in the length direction of the second droplet observation unit. The second droplet observation unit is located between two sensors of the second sensor group. The distance between the center points of the two sensors in the second sensor group is less than the length of the nozzle of the inkjet printer. The nozzle anti-collision device can reduce the loss caused by the collision between the nozzle of the inkjet printer and the droplet observation unit.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of inkjet printing technology of display panels, and in particular to a nozzle anti-collision device and a droplet observation device. BACKGROUND

[0002] At present, inkjet printing technology is increasingly widely used in the field of display screen manufacturing. In recent years, it has gradually been applied in the fields of OLED, RFID, thin-film solar cell, wearable flexible device, PCB, smart skin, etc. And it has been successfully applied in the advanced process scenarios such as pixel point deposition of OLED panel, precise coating of QLED quantum dot material, adhesive dispensing in MicroLED mass transfer, and transparent conductive line printing of flexible display screen.

[0003] At this time, in the inkjet printing process, real-time observation and regulation of the flight trajectory of the ink droplet are crucial. Through accurate monitoring of the flight speed, landing point accuracy and shape stability of the ink droplet, the sub-micron level printing resolution and film layer uniformity are ensured, which plays a decisive role in realizing the color gamut accuracy, brightness consistency and circuit conductivity of the display panel. For example: CN115782404A, an integrated ink droplet observation and collection device and method for inkjet printing, discloses the optimization design of the observation light path and the waste liquid recovery path, which ensures the synchronization of ink droplet observation and waste liquid recovery; at the same time, the specification attached to the drawings of the application discloses the normal position of the inkjet printer nozzle when observing the ink droplet, and the inkjet printer nozzle G should be located between the two ink droplet observation units. Figure 3 The normal position of the inkjet printer nozzle when observing the ink droplet is disclosed, and the inkjet printer nozzle G should be located between the two ink droplet observation units.

[0004] However, during the ink droplet observation process, the nozzle and the ink droplet observation unit may collide. The nozzles used in the inkjet printing technology in the field of display screen manufacturing are composed of numerous micron-level nozzles, which are expensive. Once the inkjet printer nozzle collides with the ink droplet observation unit, it often needs to be repaired, which may cause the entire production line to stop in the field of display screen manufacturing, resulting in significant losses.

[0005] Therefore, a nozzle anti-collision device and a droplet observation device are needed. SUMMARY

[0006] The present application provides a nozzle anti-collision device that can prevent the nozzle of an inkjet printer from colliding with the ink droplet observation unit, thereby reducing the losses caused by the collision of the inkjet printer nozzle with the ink droplet observation unit.

[0007] The application discloses a nozzle anti-collision device applied to an ink drop observation device, the ink drop observation device comprising a first ink drop observation unit, a second ink drop observation unit and an ink cartridge, wherein the ink cartridge is located between the first ink drop observation unit and the second ink drop observation unit, and the first ink drop observation unit and the second ink drop observation unit are oppositely arranged to facilitate observation of ink drop flight parameters; the nozzle anti-collision device comprises a first sensor group and a second sensor group; the first sensor group is arranged in the length direction of the first ink drop observation unit, the first ink drop observation unit is located between two sensors of the first sensor group, and the distance between the center points of the two sensors in the first sensor group is less than the length of the nozzle of the inkjet printer; the second sensor group is arranged in the length direction of the second ink drop observation unit, the second ink drop observation unit is located between two sensors of the second sensor group, and the distance between the center points of the two sensors in the second sensor group is less than the length of the nozzle of the inkjet printer.

[0008] In the above scheme, the vertical direction anti-collision problem during ink drop observation is solved; the collision between the nozzle of the inkjet printer and the top surface of the ink drop observation unit is avoided, and the nozzle is prevented from being damaged. By arranging the sensors, whether the nozzle of the inkjet printer appears above the top surface of the ink drop observation unit is monitored; if the nozzle of the inkjet printer appears above the top surface of the ink drop observation unit, a warning is given, and the sensor sends a signal to the motion controller of the nozzle, so that the controller stops the nozzle from descending in the vertical direction, thereby avoiding the collision between the nozzle and the top surface of the ink drop observation unit.

[0009] In a possible implementation, the nozzle anti-collision device further comprises a first sensor mounting rack and a second sensor mounting rack; wherein the ink cartridge is located between the second sensor mounting rack and the first sensor mounting rack, and the ink cartridge is in fastening connection with the first sensor mounting rack and the second sensor mounting rack.

[0010] In the above scheme, the position of the sensor mounting rack is disclosed, and the sensor mounting rack is in fastening connection with the ink cartridge, so that the structure is compact.

[0011] In a possible implementation, two threaded holes are arranged on the first sensor mounting rack and the second sensor mounting rack respectively, and sensors are arranged in the threaded holes, so that the installation height of the sensors is adjusted by rotating the sensors, so that the detection diameter of the sensors is equal to the width of the first ink drop observation unit or the second ink drop observation unit.

[0012] In the above scheme, the connection mode between the sensor and the sensor mounting rack is disclosed. Through the threaded connection mode, the height of the sensor in the vertical direction is conveniently adjusted; in actual use, the installation height of the sensor can be adjusted so that the maximum detection diameter of the sensor is equal to the width of the ink drop observation unit, that is, the maximum effective detection diameter of the first sensor group is equal to the width of the first ink drop observation unit, and the maximum effective detection diameter of the second sensor group is equal to the width of the second ink drop observation unit. At this time, not only is it convenient to monitor the printhead above the top surface of the ink drop observation unit, but also the problem of false shutdown caused by the printhead of the inkjet printer being mistakenly monitored when it is in the correct position (between the two ink drop observation units) can be avoided.

[0013] In a possible implementation, the printhead anti-collision device further comprises a first ink drop observation base and a second ink drop observation base, wherein the first ink drop observation base is provided with the first ink drop observation unit, and the first ink drop observation base and the first ink drop observation unit are connected in a detachable manner; the second ink drop observation base is provided with the second ink drop observation unit, and the second ink drop observation base and the second ink drop observation unit are connected in a detachable manner.

[0014] In the above scheme, the problem of printhead damage caused by the collision between the ink drop observation unit and the printhead of the inkjet printer in the horizontal direction is solved. By connecting the ink drop observation base and the ink drop observation unit in a detachable manner, when the printhead collides with the ink drop observation unit in the horizontal direction, the ink drop observation unit is directly taken away, at this time the ink drop observation unit is separated from the ink drop observation base, avoiding the damage of the printhead caused by the rigid collision between the ink drop observation unit and the printhead. At this time, it should be noted that the height of the printhead of the inkjet printer extending between the two ink drop observation units is less than the height of the ink drop observation unit.

[0015] In a possible implementation, the second ink drop observation base and the second ink drop observation unit are connected in a detachable manner, specifically including: the second ink drop observation unit and the second ink drop observation base are connected by magnetic attraction; wherein the second ink drop observation unit is provided with a magnetic attraction block, the second ink drop observation base is provided with a magnet, and the magnetic attraction block and the magnet are attracted to each other.

[0016] In the above scheme, the detachable manner is preferably the magnetic attraction manner, and the magnet block is arranged in the ink drop observation unit and the magnet is arranged in the ink drop observation base.

[0017] In a possible implementation, the magnet is embedded in the second ink drop observation base, and the magnet and the second ink drop observation base form a shallow groove type structure; the magnetic block is embedded in the second ink drop observation unit, and the magnetic block and the second ink drop observation unit form a convex type structure; the shallow groove type structure and the convex type structure are arranged in cooperation to connect the second ink drop observation base and the second ink drop observation unit in a magnet adsorption manner.

[0018] In the above scheme, it is disclosed that the ink drop observation base and the magnet form a shallow groove type structure, the magnetic block and the ink drop observation unit form a convex type structure, and the convex type structure is inserted into the shallow groove type structure like a bolt to connect the ink drop observation unit and the ink drop observation base. The design of the shallow groove type and the convex type structure facilitates the disconnection of the ink drop observation unit and the ink drop observation base when the ink drop observation unit collides with the inkjet head.

[0019] In a possible implementation, a first bolt is arranged in the second ink drop observation unit, the first bolt is connected with the magnetic block through threads, so as to adjust the position of the magnetic block by rotating the first bolt; and / or the second bolt is arranged with external threads, and the second bolt is connected with the second ink drop observation base through the external threads, and the second bolt is embedded with the magnet, so as to adjust the position of the magnet by rotating the second bolt.

[0020] In the above scheme, it is intended to disclose the active connection mode of the magnetic block and the ink drop observation unit and the active connection mode of the magnet and the ink drop observation platform in the case that the magnetic block is arranged in the ink drop observation unit and the magnet is arranged in the ink drop observation base. Generally, only the position of the magnetic block or the magnet needs to be adjusted to adjust the attraction force between the magnetic block and the magnet; of course, the positions of the magnetic block and the magnet can also be adjusted to adjust the attraction force between the magnetic block and the magnet.

[0021] In a possible implementation, the magnet is embedded in the second ink drop observation base, and the magnet and the second ink drop observation base form a convex type structure; the magnetic block is embedded in the second ink drop observation unit, and the magnetic block and the second ink drop observation unit form a shallow groove type structure; the shallow groove type structure and the convex type structure are arranged in cooperation to connect the second ink drop observation base and the second ink drop observation unit in a magnet adsorption manner.

[0022] In the above scheme, another magnet adsorption structure is disclosed, which still adopts the design of the shallow groove type and the convex type structure. Among them, the ink drop observation base and the magnet form a convex type structure, the magnetic block and the ink drop observation unit form a shallow groove type structure, and the convex type structure is inserted into the shallow groove type structure like a bolt to connect the ink drop observation unit and the ink drop observation base.

[0023] In a possible implementation, the second ink drop observation base station is detachably connected with the second ink drop observation unit, specifically including: the second ink drop observation unit is connected with the second ink drop observation base station by magnetic adsorption; wherein the second ink drop observation unit is provided with a magnet, the second ink drop observation base station is provided with a magnetic block, and the magnetic block and the magnet are adsorbed with each other; or the second ink drop observation unit is provided with a first magnet, the second ink drop observation base station is provided with a second magnet, and the first magnet and the second magnet are adsorbed with each other.

[0024] In the above scheme, the detachable mode is preferably the magnetic adsorption mode, and the ink drop observation unit is provided with a magnet, and the ink drop observation base station is provided with a magnet block; or the ink drop observation unit and the ink drop observation base station are both provided with a magnet.

[0025] The second aspect of the present application discloses an ink drop observation device, which comprises the ink-jet head anti-collision device according to any one of the above.

[0026] The present application has the following technical effects:

[0027] The vertical direction collision problem during ink drop observation is solved. By setting a sensor, it is monitored whether the ink-jet printer head appears above the top surface of the ink drop observation unit; if the ink-jet printer head appears above the top surface of the ink drop observation unit, a warning is given, and the sensor sends a signal to the motion controller of the ink-jet head, and the controller stops the ink-jet head from descending in the vertical direction, thereby avoiding the collision between the ink-jet head and the top surface of the ink drop observation unit.

[0028] The threaded connection mode between the sensor and the sensor mounting bracket. By threaded connection, the height of the sensor in the vertical direction is adjusted; in actual use, the installation height of the sensor can be adjusted so that the maximum detection diameter of the sensor is equal to the width of the ink drop observation unit, that is, the maximum effective detection diameter of the first sensor group is equal to the width of the first ink drop observation unit, and the maximum effective detection diameter of the second sensor group is equal to the width of the second ink drop observation unit. At this time, not only the ink-jet head above the top surface of the ink drop observation unit is monitored, but also the problem of false stop caused by the ink-jet printer head being mistakenly monitored when it is in the correct position (between the two ink drop observation units) is avoided.

[0029] The problem of ink-jet head damage caused by collision between the ink drop observation unit and the ink-jet printer head in the horizontal direction is solved. The ink drop observation base station is detachably connected with the ink drop observation unit; when the ink-jet head collides with the ink drop observation unit in the horizontal direction, the ink drop observation unit is directly taken away, at this time the ink drop observation unit is separated from the ink drop observation base station, avoiding the damage of the ink-jet head caused by the rigid collision between the ink drop observation unit and the ink-jet head.

[0030] The convex type structure is inserted into the shallow groove type structure like a bolt, connecting the ink drop observation unit and the ink drop observation base. The shallow groove type and the convex type structure design facilitates the ink drop observation unit and the ink drop observation base to be separated when the ink drop observation unit collides with the ink jet head;

[0031] In the case of setting the magnetic block in the ink drop observation unit and the magnet in the ink drop observation base, the magnetic block and the ink drop observation unit are set in a movable connection mode, and the magnet and the ink drop observation platform are set in a movable connection mode. Generally, only the position of the magnetic block or the magnet needs to be adjusted to adjust the suction force between the magnetic block and the magnet; of course, the positions of the magnetic block and the magnet can also be adjusted to adjust the suction force between the magnetic block and the magnet. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 A structure schematic diagram of a head collision prevention device disclosed in the present application;

[0033] Figure 2 A structure schematic diagram of another head collision prevention device disclosed in the present application;

[0034] Figure 3 A top view structure schematic diagram of a head collision prevention device disclosed in the present application;

[0035] Figure 4 A side view structure schematic diagram of a head collision prevention device disclosed in the present application;

[0036] Figure 5 A structure schematic diagram of an ink drop observation assembly in a head collision prevention device disclosed in the present application;

[0037] Figure 6 A structure schematic diagram of an ink drop observation assembly in a head collision prevention device disclosed in the present application;

[0038] Figure 7 A structure schematic diagram of an ink drop observation assembly in a head collision prevention device disclosed in the present application;

[0039] Figure 8 A structure schematic diagram of an ink drop observation assembly in a head collision prevention device disclosed in the present application;

[0040] Figure 9 A schematic diagram of an ink drop observation principle in a head collision prevention device disclosed in the present application.

[0041] In the above figure: sensor 100, ink cartridge 200, first ink drop observation unit 300, first ink drop observation base 400, light path schematic line 500, sensor detection schematic line 600, second ink drop observation unit 700, second ink drop observation base 800, first sensor mounting bracket 901, second sensor mounting bracket 902, magnetic block 701, first bolt 702, cover plate 703, magnet 801, second bolt 802. DETAILED DESCRIPTION

[0042] In order to enable a person skilled in the art to better understand the technical solutions in the specification, the technical solutions in the embodiments of the specification will be clearly and completely described below in combination with the drawings in the embodiments of the specification. Obviously, the described embodiments are only some of the embodiments of the present application, not all.

[0043] In the description of the embodiments of the present application, the words such as "for example" or "for instance" are used to represent an example, illustration or explanation. Any embodiment or design scheme described as "for example" or "for instance" in the embodiments of the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the words such as "for example" or "for instance" are intended to present the relevant concept in a specific manner.

[0044] The application scenario of the specification is that when the nozzle used in the inkjet printing technology in the field of display screen manufacturing collides with the ink drop observation unit, it often causes damage to the nozzle. The nozzle is expensive, and the maintenance of the damaged nozzle may cause the shutdown of the entire display screen production and manufacturing line, causing great loss.

[0045] Further, the moving path in the ink drop flight observation process of the nozzle is often executed by a program, and the collision between the ink drop observation unit and the nozzle is a small probability event. However, the ink drop flight observation is in a complex working condition, and the collision between the inkjet printer nozzle and the ink drop observation unit may occur due to various reasons, and as known above, once the collision occurs, it will cause great loss.

[0046] As shown in Figure 3 , the length direction in the specification is the X-axis direction, the width direction in the specification is the Y-axis direction, and the height is the Z-axis direction Figure 9 . The anti-collision device based on ink drop observation in the specification can be divided into two directions of anti-collision, one is the vertical direction (such as Figure 9 Z direction in Figure 3The plane in which XY is shown needs to provide a collision avoidance scheme for the horizontal direction of the ink ejection head of the inkjet printer and the ink drop observation unit 300 and the ink drop observation unit 700 (i.e. the side of the ink drop observation unit 300 and the ink drop observation unit 700); the vertical direction is the direction perpendicular to XY, and a collision avoidance scheme needs to be provided for the vertical direction of the ink ejection head of the inkjet printer and the ink drop observation unit 300 and the ink drop observation unit 700 (i.e. the top surface of the ink drop observation unit 300 and the ink drop observation unit 700).

[0047] The type and type of sensor are not limited in the specification, and the ink drop observation unit can be integrally formed with the ink cartridge, or the ink drop observation unit can be fastened to the ink cartridge, and no limitation is made in this regard. Furthermore, in order to further prevent collision, the ink drop observation unit can use non-technical materials.

[0048] The specification discloses a nozzle collision avoidance device. The nozzle collision avoidance device is applied to an ink drop observation device, which includes a first ink drop observation unit 300, a second ink drop observation unit 700, and an ink cartridge 200, wherein the ink cartridge 200 is located between the first ink drop observation unit 300 and the second ink drop observation unit 700, and the first ink drop observation unit 300 and the second ink drop observation unit 700 are oppositely arranged to facilitate observation of ink drop flight parameters; the nozzle collision avoidance device includes a first sensor group and a second sensor group; the first sensor group is arranged in the length direction of the first ink drop observation unit 300, the first ink drop observation unit 700 is located between two sensors of the first sensor group, and the distance between the center points of the two sensors in the first sensor group is less than the length of the ink ejection head of the inkjet printer; the second sensor group is arranged in the length direction of the second ink drop observation unit, the second ink drop observation unit is located between two sensors of the second sensor group, and the distance between the center points of the two sensors in the second sensor group is less than the length of the ink ejection head of the inkjet printer.

[0049] At this time, the ink ejection head of the inkjet printer is prevented from colliding with the top surface of the ink drop observation unit, causing damage to the nozzle. By arranging the sensors, it is monitored whether the ink ejection head of the inkjet printer appears above the top surface of the ink drop observation unit; if the ink ejection head of the inkjet printer appears above the top surface of the ink drop observation unit, a warning is given, and the sensor sends a signal to the motion controller of the nozzle, and the controller stops the nozzle from descending in the vertical direction, thereby preventing the nozzle from colliding with the top surface of the ink drop observation unit.

[0050] As shown in Figure 3 . Figure 3 The top surfaces of the first ink drop observation unit 300 and the second ink drop observation unit 700 shown in the above-mentioned first ink drop observation unit 300 and the second ink drop observation unit 700, the first sensor mounting bracket 901 and the second sensor mounting bracket 902 are each provided with two sensors 100 (as Figure 1The first ink drop observation unit 300 and the second ink drop observation unit 700 are oppositely arranged through the optical path schematic line 500 (as shown in FIG. 5) and the observation light path is as described in CN115782404A). The ink drop parameters sprayed by the nozzle are observed, and the first observation unit 300 is located between each sensor in the first sensor mounting frame 901 and the second sensor mounting frame 902, and the second observation unit 700 is the same. Figure 1 , as shown in Figure 2 and Figure 5 , the observation light path is as described in CN115782404A), the ink drop parameters sprayed by the nozzle are observed. And the first observation unit 300 is located between each sensor in the first sensor mounting frame 901 and the second sensor mounting frame 902, and the second observation unit 700 is the same.

[0051] In the above, the number of sensors in the first sensor group and the second sensor group is preferably 2. In actual use, it can also be increased or decreased. When it is reduced, it is considered that when the ink drop observation of the inkjet printer is carried out in the field of display screen production and manufacturing, the nozzle in the motion module (as shown in the schematic diagram of Figure 9 ) has a very small probability of deviation in the X-axis direction during the vertical downward process. Often, the deviation in the Y-axis direction occurs, which causes the nozzle to collide with the ink drop observation unit. Therefore, as shown in Figure 3 , only one sensor can be installed on the first sensor mounting frame 901 and the second sensor mounting frame 902. However, two sensors are installed on the first sensor mounting frame 901 and the second sensor mounting frame 902, which can further ensure the safety of the nozzle and further avoid collision with the top surface of the ink drop observation unit (i.e. the first ink drop observation unit and the second ink drop observation unit) in the vertical direction.

[0052] In addition, the nozzle of the inkjet printer has a certain length. The distance between the center points of the two sensors in the first sensor group and the second sensor group (which can be referred to as the sensor group) is less than the length of the nozzle of the inkjet printer, in order to ensure that the nozzle will be monitored by the sensor once it deviates in the X-axis direction. Moreover, the maximum effective detection diameter of any one sensor in the sensor group is equal to the width of the ink drop observation unit in the Y-axis direction, in order to further ensure that the nozzle will be monitored by the sensor once it deviates in the Y-axis direction when it is descending. As shown in Figure 3 , the sensor detection schematic line 600 is the maximum effective detection circle schematic of the sensor, and the maximum effective detection diameter D is equal to the width W of the ink drop observation unit in the Y-axis direction at this time.

[0053] Further, the nozzle can be installed in the motion assembly (such as Figure 9The sensor can first detect the moving assembly without detecting the printhead (the number of nozzles in the printhead determines the area of the detection surface of the printhead; in general, the larger the number of nozzles in the printhead, the larger the area of the detection surface of the printhead; when the number of nozzles is small (at this time, the printhead can also be referred to as a "needle"), the detection surface of the printhead is small, and the sensor may also detect the mounting surface of the printhead without detecting the detection surface of the printhead); at this time, it can still cause the printhead to collide with the top surface of the droplet observation unit. In order to avoid this collision problem, a sufficient safety distance needs to be reserved; that is, as shown in Figure 4 , the distance between the maximum effective detection surface of the sensor and the top surface of the droplet observation unit is the safety distance H, which is much larger than the height h of the printhead in the Z-axis direction (as shown in Figure 9 , h is the distance between the detection surface of the printhead and the mounting surface of the printhead). At this time, whether the sensor detects the printhead or the moving assembly, it will send a signal to the controller of the moving assembly, and the controller will stop the downward movement of the printhead of the inkjet printer in the Z-axis direction, and will also send a signal to the controller of the droplet observation device, so that the ink cartridge and the droplet observation assembly (the droplet observation unit and the droplet observation base) will be lowered to avoid collision.

[0054] In one example, the printhead collision avoidance device further comprises a first sensor mounting bracket and a second sensor mounting bracket; wherein the ink cartridge is located between the second sensor mounting bracket and the first sensor mounting bracket, and the ink cartridge is in fastening connection with the first sensor mounting bracket and the second sensor mounting bracket.

[0055] As shown in Figure 3 and Figure 4 , the ink cartridge and the sensor mounting bracket can be in fastening connection through screws.

[0056] In one example, two threaded holes are provided on the first sensor mounting bracket and the second sensor mounting bracket respectively, and a sensor is arranged in the threaded hole, so as to adjust the installation height of the sensor by rotating the sensor, so that the detection diameter of the sensor is equal to the width of the first droplet observation unit or the second droplet observation unit.

[0057] At this time, the height of the sensor in the vertical direction (i.e. the Z-axis direction) is adjusted by means of threaded connection; in actual use, the installation height of the sensor can be adjusted so that the maximum detection diameter of the sensor is equal to the width of the ink drop observation unit, that is, the maximum effective detection diameter of the first sensor group is equal to the width of the first ink drop observation unit, and the maximum effective detection diameter of the second sensor group is equal to the width of the second ink drop observation unit. At this time, not only is it convenient to monitor the printhead above the top surface of the ink drop observation unit, but also the problem of false shutdown caused by the printhead of the inkjet printer being mistakenly monitored when it is in the correct position (between the two ink drop observation units) can be avoided.

[0058] In one example, the printhead anti-collision device further comprises a first ink drop observation base 400 and a second ink drop observation base 800, wherein the first ink drop observation base 400 is provided with the first ink drop observation unit 300, and the first ink drop observation base 400 and the first ink drop observation unit 300 are connected in a detachable manner; the second ink drop observation base 800 is provided with the second ink drop observation unit 700, and the second ink drop observation base 800 and the second ink drop observation unit 700 are connected in a detachable manner.

[0059] At this time, the ink drop observation base and the ink drop observation unit are connected in a detachable manner (such as Figure 5 When the printhead collides with the ink drop observation unit in the horizontal direction, the ink drop observation unit is directly taken away, at which time the ink drop observation unit is separated from the ink drop observation base, avoiding damage to the printhead caused by the rigid collision of the ink drop observation unit and the printhead. At this time, it should be noted that the height of the printhead of the inkjet printer extending between the two ink drop observation units is less than the height of the ink drop observation unit (as shown in Figure 9

[0060] This specification mainly describes the detachable manner by means of magnetic attraction. The advantage of magnetic attraction is that it not only allows the printhead and the ink drop observation unit to "softly" collide, but also facilitates adjustment of the size of the magnetic attraction force, further adjusting the intensity of the "soft" collision; and if the printhead collides with the ink drop observation unit, it is also convenient to maintain.

[0061] In the magnetic attraction manner, a magnetic attraction block can be provided in the ink drop observation unit, and a magnet can be provided in the ink drop observation base (i.e. the first ink drop observation base and the second ink drop observation base); or a magnet can be provided in the ink drop observation unit, and a magnetic attraction block can be provided in the ink drop observation base; or a magnet can be provided in both the ink drop observation unit and the ink drop observation base.

[0062] ​As in one example, the second ink drop observation base station is detachably connected with the second ink drop observation unit, specifically including: the second ink drop observation unit is connected with the second ink drop observation base station by the way of magnetic adsorption; wherein the second ink drop observation unit is provided with a magnetic adsorption block, the second ink drop observation base station is provided with a magnet, and the magnetic adsorption block and the magnet are adsorbed to each other.

[0063] As in another example, the second ink drop observation base station is detachably connected with the second ink drop observation unit, specifically including: the second ink drop observation unit is connected with the second ink drop observation base station by the way of magnetic adsorption; wherein the second ink drop observation unit is provided with a magnet, the second ink drop observation base station is provided with a magnetic adsorption block, and the magnetic adsorption block and the magnet are adsorbed to each other; or the second ink drop observation unit is provided with a first magnet, the second ink drop observation base station is provided with a second magnet, and the first magnet and the second magnet are adsorbed to each other.

[0064] For the convenience of further description, this specification further illustrates by setting a magnetic adsorption block in the ink drop observation unit and a magnet in the ink drop observation base station. At this time, on the basis of the magnetic adsorption method, the positioning problem of the ink drop observation unit also needs to be considered; that is, the positions of the ink drop observation unit and the ink drop observation base station need to be relatively fixed and cannot be moved arbitrarily. Arbitrary movement will also cause the mis-collision of the inkjet head and the ink drop observation unit. Therefore, two groups of magnetic adsorption are provided between the ink drop observation base station and the ink drop observation unit. Moreover, one side of the magnetic adsorption method is provided as a protruding structure, and the other side of the magnetic adsorption method is provided as a shallow groove structure, and the protruding structure functions as a bolt; not only is the positioning of the ink drop observation unit and the ink drop observation base station facilitated, but the shallow groove structure design also enables the ink drop observation unit to be smoothly separated from the ink drop observation base station when the inkjet head collides with the ink drop observation unit.

[0065] At this time, the ink drop observation unit and the magnetic adsorption block can be provided as a protruding structure or a shallow groove structure, and the corresponding ink drop observation base station is provided as a shallow groove structure or a protruding structure.

[0066] As in one example, the magnet is embedded in the second ink drop observation base station, and the magnet and the second ink drop observation base station form a shallow groove structure; the magnetic adsorption block is embedded in the second ink drop observation unit, and the magnetic adsorption block and the second ink drop observation unit form a protruding structure; the shallow groove structure and the protruding structure are cooperatively arranged to connect the second ink drop observation base station and the second ink drop observation unit by the way of magnetic adsorption.

[0067] As in another example, the magnet is embedded in the second ink drop observation base station, and the magnet and the second ink drop observation base station form a protruding structure; the magnetic adsorption block is embedded in the second ink drop observation unit, and the magnetic adsorption block and the second ink drop observation unit form a shallow groove structure; the shallow groove structure and the protruding structure are cooperatively arranged to connect the second ink drop observation base station and the second ink drop observation unit by the way of magnetic adsorption.

[0068] For further convenience of description, in the following examples of the present specification, the ink droplet observation unit and the magnetic block form a convex structure, and the ink droplet observation base and the magnet form a shallow groove structure, which are described as shown in FIG. 1. Figures 6-8 As shown in FIG. 1, the ink droplet observation unit 100 includes a main body 101, a first bolt 102, a magnetic block 103, a second bolt 104, and a magnet 105. Figure 7 As shown in FIG. 1, the ink droplet observation unit 100 includes a main body 101, a first bolt 102, a magnetic block 103, a second bolt 104, and a magnet 105. Figure 8 As shown in FIG. 1, the ink droplet observation unit 100 includes a main body 101, a first bolt 102, a magnetic block 103, a second bolt 104, and a magnet 105. As shown in FIG. 1, the ink droplet observation unit 100 includes a main body 101, a first bolt 102, a magnetic block 103, a second bolt 104, and a magnet 105.

[0069] In one example, the first bolt 702 is provided in the second ink droplet observation unit 700, the first bolt 702 is threadedly connected with the magnetic block 701, so as to adjust the position of the magnetic block 701 by rotating the first bolt 702; and / or the second bolt 802 is provided with an external thread, and the second bolt 802 is threadedly connected with the second ink droplet observation base 800 through the external thread, and the magnet 801 is embedded in the second bolt, so as to adjust the position of the magnet by rotating the second bolt.

[0070] Generally, only the position of the magnetic block or the magnet needs to be adjusted, so as to adjust the magnetic attraction force between the magnetic block and the magnet; of course, the positions of the magnetic block and the magnet can also be adjusted simultaneously, so as to adjust the magnetic attraction force between the magnetic block and the magnet; the magnetic attraction force needs to be ensured to be stable between the ink droplet observation base and the ink droplet observation unit when no collision occurs between the ink droplet observation base and the ink droplet observation unit; when collision occurs, the ink droplet observation base and the ink droplet observation unit need to be smoothly separated, without causing damage to the nozzle. Figure 8 As shown in FIG. 1, the magnetic block 103 and the magnet 105 are in a non-contact state, of course, they can also be in direct contact; and the diameter of the magnetic block 103 can be the same as or different from the diameter of the magnet 105.

[0071] In the present specification, the shapes of the magnet and the magnetic block are preferably cylindrical, and the cylindrical magnet and the magnetic block have a larger magnetic attraction force per unit area than the magnet or the magnetic block in the shape of a cube or a cuboid; however, the present specification does not limit the shape of the magnet or the magnetic block.

[0072] The second aspect of the present application discloses an ink droplet observation device, which includes the nozzle anti-collision device according to any one of the above.

[0073] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "X", "Y", "Z" and the like in the drawings is based on the orientation or positional relationship shown in the drawings of the specification, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0074] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "up", "down" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0075] It should be noted that in the present application, relational terms such as "first" and "second" and the like are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the sentence "including a…" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0076] The above is only a specific embodiment of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A showerhead collision avoidance apparatus, comprising: The nozzle anti-collision device is applied to an ink drop observation device, the ink drop observation device comprising a first ink drop observation unit, a second ink drop observation unit and an ink cartridge, the ink cartridge being located between the first ink drop observation unit and the second ink drop observation unit, the first ink drop observation unit and the second ink drop observation unit being oppositely arranged so as to facilitate observation of ink drop flight parameters; The nozzle anti-collision device comprises a first sensor group and a second sensor group; wherein, The first sensor group is arranged in the length direction of the first ink drop observation unit, the first ink drop observation unit being located between two sensors of the first sensor group, and the distance between the center points of the two sensors in the first sensor group being less than the length of the nozzle of the inkjet printer; The second sensor group is arranged in the length direction of the second ink drop observation unit, the second ink drop observation unit being located between two sensors of the second sensor group, and the distance between the center points of the two sensors in the second sensor group being less than the length of the nozzle of the inkjet printer.

2. The showerhead collision avoidance apparatus of claim 1, wherein, The nozzle anti-collision device further comprises a first sensor mounting bracket and a second sensor mounting bracket; wherein, The ink cartridge is located between the second sensor mounting bracket and the first sensor mounting bracket, and the ink cartridge is fastened to the first sensor mounting bracket and the second sensor mounting bracket.

3. The showerhead collision avoidance apparatus of claim 2, wherein, Two threaded holes are respectively arranged on the first sensor mounting bracket and the second sensor mounting bracket, and sensors are arranged in the threaded holes, so as to adjust the installation height of the sensors by rotating the sensors, so that the detection diameter of the sensors is equal to the width of the first ink drop observation unit or the second ink drop observation unit.

4. The showerhead collision avoidance apparatus of claim 1, wherein The nozzle anti-collision device further comprises a first ink drop observation base and a second ink drop observation base, wherein, The first ink drop observation unit is arranged on the first ink drop observation base, and the first ink drop observation base and the first ink drop observation unit are connected in a detachable manner; The second ink drop observation unit is arranged on the second ink drop observation base, and the second ink drop observation base and the second ink drop observation unit are connected in a detachable manner.

5. The showerhead collision avoidance apparatus of claim 4, wherein, The second ink drop observation base and the second ink drop observation unit are connected in a detachable manner, specifically comprising: The second ink drop observation unit and the second ink drop observation base are connected in a magnetic attraction manner; wherein a magnetic attraction block is arranged in the second ink drop observation unit, a magnet is arranged in the second ink drop observation base, and the magnetic attraction block and the magnet are attracted to each other.

6. The showerhead collision avoidance apparatus of claim 5, wherein, The magnet is embedded in the second ink drop observation base, and the magnet and the second ink drop observation base form a shallow groove structure; The magnetic attraction block is embedded in the second ink drop observation unit, and the magnetic attraction block and the second ink drop observation unit form a convex structure; The shallow groove structure and the convex structure are arranged in cooperation, and the second ink drop observation base and the second ink drop observation unit are connected in a magnetic attraction manner.

7. A shower nozzle collision avoidance device according to claim 5 or 6, wherein A first bolt is arranged in the second ink drop observation unit, the first bolt and the magnetic attraction block are connected in a threaded manner, so as to adjust the position of the magnetic attraction block by rotating the first bolt; and / or A second bolt is arranged in the second ink drop observation base, the second bolt is provided with external threads, and the second bolt is screwed with the second ink drop observation base through the external threads, the magnet is embedded in the second bolt to facilitate adjusting the position of the magnet by rotating the second bolt.

8. The showerhead collision avoidance apparatus of claim 5, wherein, The magnet is embedded in the second ink drop observation base, and the magnet and the second ink drop observation base form a convex structure; The magnetic block is embedded in the second ink drop observation unit, and the magnetic block and the second ink drop observation unit form a shallow groove structure; The shallow groove structure and the convex structure are matched to connect the second ink drop observation base and the second ink drop observation unit by magnetic attraction.

9. The showerhead collision avoidance apparatus of claim 4, wherein, The second ink drop observation base and the second ink drop observation unit are connected in a detachable manner, specifically including: The second ink drop observation unit and the second ink drop observation base are connected by magnetic attraction; wherein, The second ink drop observation unit is provided with a magnet, the second ink drop observation base is provided with a magnetic block, and the magnetic block and the magnet are attracted to each other; or the second ink drop observation unit is provided with a first magnet, the second ink drop observation base is provided with a second magnet, and the first magnet and the second magnet are attracted to each other.

10. An ink droplet observation apparatus characterized by comprising: The ink drop observation device comprises the nozzle collision prevention device according to any one of claims 1-9.

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