Printing and ink-jet device for laundry sheets

Abstract

The utility model relates to the technical field of laundry sheet processing, in particular to a laundry sheet printing and ink jetting device which comprises a rack, a working platform arranged on the rack and used for conveying laundry sheets to be fed, and a double-shaft moving mechanism connected to the working platform and used for controlling the ink jetting position. A spray head assembly used for ink-jet printing and a crushing assembly used for grinding essence or aromatic beads are arranged in the plurality of transverse moving cases; the nozzle assembly comprises an ink storage box and a nozzle, the ink storage box is arranged in the transverse moving case, and a heating assembly used for heating ink and a particle suspension stirring assembly used for stirring the ink to be mixed with essence or fragrance retaining beads are arranged in the ink storage box. According to the utility model, by arranging the crushing assembly and the particle suspension stirring assembly, essence or fragrance-retaining beads can be quickly dissolved in ink, so that fragrance can be slowly released to enable the laundry sheet to achieve a fragrance-retaining effect; meanwhile, the ink can be prevented from being dispersed after being sprayed, so that the attractiveness and practicability of the laundry sheet are improved.

Description

Technical Field

[0001] This utility model relates to the field of laundry detergent sheet processing technology, and in particular to a laundry detergent sheet printing inkjet device. Background Technology

[0002] Laundry sheets, short for nano-concentrated laundry sheets, are a type of neutral synthetic detergent. They come in sheet form, making them much more convenient than bulky packets of laundry powder or liquid. Their effective detergent components are concentrated in a thin sheet. Traditional laundry sheets are monochrome and fragrance-free, limiting their functionality. To meet market demands, modern laundry sheets can now be printed with various designs using inkjet printing, enhancing both their aesthetics and practicality. Furthermore, by incorporating fragrances or scent beads into the inkjet printing process, the printed sheets can retain their scent.

[0003] Existing inkjet printers typically only print on fabrics or paper. When printing on laundry detergent sheets, the ink mixes with fragrance or scent beads to produce particulate deposits, which can cause the printhead to clog during the printing process. Additionally, the ink can react with air during printing, leading to uneven color. As a result, the printed pattern is blurry, affecting the appearance of the laundry detergent sheets and increasing production difficulty. Utility Model Content

[0004] In order to overcome the technical defects mentioned in the background art, the purpose of this utility model is to provide a high-efficiency and stable inkjet printing device for laundry sheets, which ensures that the fragrance or fragrance beads are quickly combined with the ink, while avoiding nozzle clogging and ensuring uniform ink spraying so that the laundry sheets retain their fragrance, thereby achieving a high-quality printing and dyeing effect.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A laundry detergent sheet printing inkjet device includes a frame, a work platform mounted on the frame for feeding laundry detergent sheets, and a dual-axis moving mechanism connected to the work platform for controlling the inkjet position. Multiple transverse moving housings are slidably connected to the dual-axis moving mechanism. Each transverse moving housing contains a printhead assembly for inkjet printing and a pulverizing assembly for grinding fragrance or scent beads. The printhead assembly is connected to the pulverizing assembly. The printhead assembly includes an ink reservoir for storing ink and a printhead for printing ink. The ink reservoir is located inside the transverse moving housing and contains a heating assembly for heating the ink and a microparticle suspension and stirring assembly for mixing the ink with fragrance or scent beads. The printhead has a built-in micro-oscillator and a micro-rotating cleaning brush, with the micro-oscillator and micro-rotating cleaning brush being kinetically connected. One end of the printhead is connected to the ink reservoir, and the other end extends out of the transverse moving housing.

[0007] Preferably, the pulverizing assembly includes a capsule chamber for holding fragrance or fragrance beads, a grinding disc disposed at the bottom of the capsule chamber, and a pulverizing wheel rotatably connected to the grinding disc. The capsule chamber is fixed inside a transverse moving housing, and a connecting channel for communicating with an ink storage cartridge is provided at the bottom of the capsule chamber. The grinding disc has a plurality of grinding grooves distributed in a ring, and the plurality of grinding grooves are engaged with the pulverizing wheel. The pulverizing wheel is rotatably connected to a rotating shaft.

[0008] Preferably, the particle suspension stirring assembly includes a stirring shaft, stirring blades, and a positioning structure. One end of the stirring shaft is connected to a micro oscillator via a coupling. The stirring blades are divided into an upper blade and a lower blade, both of which are connected to the stirring shaft, and the upper and lower blades have different cutting directions. The positioning structure is disposed on the top of the stirring shaft and is used to fix the stirring blades.

[0009] Preferably, the heating assembly includes a sensor for detecting ink temperature, a heater for heating the mixed ink and fragrance or fragrance beads, and a temperature controller for controlling and adjusting the heating temperature. The sensor is disposed on the outer wall of the ink reservoir and is signal-connected to the heater and the temperature controller respectively. The heater is disposed on the bottom of the ink reservoir and is electrically connected to the temperature controller.

[0010] Preferably, an isolation membrane or an inert gas-filled space is provided in the inkjet path formed between the printhead and the laundry sheet.

[0011] Preferably, the dual-axis moving mechanism includes a transverse moving beam, a longitudinal moving slide rail, and a drive assembly. The transverse moving beam is arranged along the width direction of the frame, and support frames are provided on both sides of the transverse moving beam. The support frames are slidably connected to the longitudinal moving slide rail. A linear guide rail is provided on the side wall of the transverse moving beam. The longitudinal moving slide rail is arranged along the length direction of the frame, and one end of the longitudinal moving slide rail is connected to the drive assembly for transmission.

[0012] Preferably, the transverse chassis is slidably connected to the linear guide rail, and a fixing seat for fixing the printhead is provided at the bottom of the transverse chassis, with an opening for the printhead to extend through at the middle position of the fixing seat; an adjustment component for adjusting the inkjet printing angle is rotatably connected between the two side plates of the transverse chassis.

[0013] Preferably, the adjustment assembly includes an adjustment shaft, an adjustment cam, and a U-shaped adjustment block. The adjustment shaft passes through both side plates of the transverse moving chassis and extends partially beyond the side plates. The adjustment cam is sleeved on the adjustment shaft and is engaged with the U-shaped adjustment block. The U-shaped adjustment block is fixedly connected to the side plates of the transverse moving chassis.

[0014] In summary, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model uses a crushing component to crush fragrance or fragrance beads, allowing the crushed fragrance or fragrance beads to fully combine with ink under the stirring action of a microparticle suspension stirring component. This ensures that the fragrance or fragrance beads can quickly dissolve in the ink, allowing them to slowly release fragrance and achieve a fragrance retention effect. At the same time, it also prevents the ink from dispersing after spraying, thus ensuring that the ink can be evenly printed on the laundry sheet after spraying, thereby improving the aesthetics and practicality of the laundry sheet.

[0016] 2. This utility model uses multiple sets of printhead assemblies to work together, precisely controlling the amount and time of each drop of ink spraying to ensure consistent coloring in all parts and achieve a colorful and vibrant effect on laundry sheets. Furthermore, the cleaning components built into the printhead assemblies regularly clean the nozzles to prevent ink from drying out and clogging, keeping the spraying unobstructed and thus preventing the accumulation of mixed liquid that could clog the printheads and affect the quality of inkjet printing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the inkjet printing device for laundry sheets of this utility model;

[0018] Figure 2 This is a schematic diagram of the transverse moving chassis in this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the transverse moving chassis in this utility model;

[0020] Figure 4 yes Figure 3 Enlarged view of the structure at point a;

[0021] Figure 5 This is a sectional view of the transverse moving chassis in this utility model;

[0022] Figure 6 yes Figure 5 Enlarged view of the structure at point b.

[0023] Explanation of the reference numerals in the figure:

[0024] 1. Frame; 2. Working platform; 3. Dual-axis moving mechanism; 31. Lateral moving beam; 311. Support frame; 312. Linear guide rail; 32. Longitudinal moving slide rail; 33. Drive assembly; 4. Lateral moving housing; 41. Fixed base; 42. Adjustment assembly; 421. Adjustment shaft; 422. Adjustment cam; 423. U-shaped adjustment block; 5. Printhead assembly; 51. Ink cartridge; 52. Printhead; 6. Crushing assembly; 61. Capsule chamber; 62. Grinding disc; 63. Crushing wheel; 64. Rotating shaft; 65. Connecting channel; 7. Heating assembly; 71. Sensor; 72. Heater; 73. Temperature controller; 8. Particle suspension and stirring assembly; 81. Stirring shaft; 82. Stirring blade; 83. Positioning structure; 84. Coupling; 9. Micro oscillator; 10. Micro rotating cleaning brush. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0026] Those skilled in the art should understand that, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0027] In the description of this utility model, the use of terms such as "several" means one or more, with "multiple" meaning two or more. Terms like "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of terms like "first," "second," and "third" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the quantity of indicated technical features, or the sequential relationship between indicated technical features.

[0028] The following is in conjunction with the appendix Figure 1-6 The present invention will provide a more detailed description of an embodiment of a laundry detergent sheet printing inkjet device.

[0029] A laundry detergent sheet printing inkjet device, such as Figure 1 , 2 and Figure 4 As shown, the device includes a frame 1, a work platform 2 mounted on the frame 1 for feeding laundry sheets, and a dual-axis moving mechanism 3 connected to the work platform 2 for controlling the inkjet position. Multiple transverse moving housings 4 are slidably connected to the dual-axis moving mechanism 3. Each transverse moving housing 4 contains a printhead assembly 5 for inkjet printing and a pulverizing assembly 6 for grinding fragrance or scent beads. The printhead assembly 5 is connected to the pulverizing assembly 6. The printhead assembly 5 includes an ink reservoir 51 for storing ink and a printhead 52 for printing ink. The ink reservoir 51 is located inside the transverse moving housing 4 and contains a heating assembly 7 for heating the ink and a microparticle suspension stirring assembly 8 for mixing the ink with fragrance or scent beads. One end of the printhead 52 is connected to the ink reservoir 51, and the other end extends out of the transverse moving housing 4. The printhead 52 has a built-in micro-rotating cleaning brush 10, one end of which is connected to a micro-oscillator 9.

[0030] Specifically, the cationic fabric softener contained in the fragrance beads used in this invention combines with the anions contained in the ink, which can quickly solidify the pigments in the ink and cause them to settle, thereby fixing the pigments in the ink onto the laundry sheet. This allows the laundry sheet to not only complete inkjet printing, but also to incorporate the fragrance of the fragrance beads into the laundry sheet.

[0031] The process involves using a crushing component 6 to break down fragrance or scent beads, distributing them evenly within the ink without affecting inkjet flow. This preserves the fragrance's release properties, ensuring thorough integration with the ink and preventing the accumulation of fragrance or scent bead mixtures that could clog the printhead 52. Simultaneously, during ink ejection from the printhead 52, a micro-oscillator 9 drives a micro-rotating cleaning brush 10 to clean the printhead 52. This brush, through internal mechanical movement, periodically cleans the nozzles, preventing ink residue buildup and ensuring smooth inkjet printing. The entire printing principle is similar to that of a color printer, dynamically adjusting the ink output ratio of different printheads 52 according to the pattern requirements to achieve high-precision color reproduction. Furthermore, through the collaborative operation of multiple printheads 52 and intelligent algorithms, the ejection volume and timing of each ink drop are precisely controlled, ensuring consistent coloring across all areas and achieving a vibrant and colorful effect on the laundry detergent sheets.

[0032] It is worth mentioning that the transverse moving housing 4 in this utility model is a detachable structure. That is, the transverse moving housing 4 is attached to the dual-axis moving mechanism 3 by a hook set at the top. When it is necessary to add ink, fragrance or fragrance beads, simply remove the transverse moving housing 4 from the dual-axis transmission mechanism and open the top cover of the transverse moving housing 4 to add ink to the ink storage box 51 or add fragrance or fragrance beads to the pulverizing component 6. The whole structure is simple and easy to operate.

[0033] In this embodiment, as Figure 1 As shown, the dual-axis moving mechanism 3 includes a transverse moving beam 31, a longitudinal moving slide rail 32, and a drive assembly 33. The transverse moving beam 31 is arranged along the width direction of the frame 1, and support frames 311 are provided on both sides of the transverse moving beam 31. The support frames 311 are slidably connected to the longitudinal moving slide rail 32. A linear guide rail 312 is provided on the side wall of the transverse moving beam 31. The longitudinal moving slide rail 32 is arranged along the length direction of the frame 1, and one end of the longitudinal moving slide rail 32 is connected to the drive assembly 33 for transmission.

[0034] Specifically, the transverse moving beam 31 and the longitudinal moving slide rail 32 enable the printhead 52 to move along the X and Y directions of the workbench, facilitating the spraying of ink onto specific positions on the laundry sheet according to a preset pattern. During movement, the transverse moving housing 4 is slidably connected to the linear guide rail 312, allowing it to move left and right along the transverse moving beam 31, thereby adjusting the inkjet position. Simultaneously, the transverse moving beam 31 is slidably connected to the longitudinal moving slide rail 32 via support frames 311 at both ends, driving the transverse moving beam 31 and the transverse moving housing 4 to move along the length of the work platform 2, thereby adjusting the inkjet printing position. The drive assembly 33 employs a drive motor and a pulley assembly. The output end of the drive motor is connected to the pulley assembly for transmission. The pulley assembly is respectively mounted on the longitudinal moving slide rail 32 and the transverse moving beam 31, enabling the drive motor to drive the sliding of the longitudinal moving slide rail 32 and the transverse moving beam 31.

[0035] In this embodiment, as Figure 3 As shown, the heating assembly 7 includes a sensor 71 for detecting ink temperature, a heater 72 for heating the mixed ink and fragrance or fragrance beads, and a temperature controller 73 for controlling and adjusting the heating temperature. The sensor 71 is disposed on the outer wall of the ink storage box 51, and the sensor 71 is connected to the heater 72 and the temperature controller 73 respectively. The heater 72 is disposed on the bottom end of the ink storage box 51, and the heater 72 is electrically connected to the temperature controller 73.

[0036] Specifically, in order to quickly fuse fragrance or fragrance beads, heating component 7 is used to heat the ink and the crushed fragrance or fragrance beads. The melting property of the fragrance or fragrance beads after heating allows them to quickly combine with the ink, avoiding the formation of clumps. Sensor 71 is used to detect the heating temperature of heater 72 in real time and feed the signal back to temperature controller 73. Temperature controller 73 is then used to adjust the heating temperature of heater 72 to prevent the heating temperature from being too high, which would cause the fragrance or fragrance beads and ink to lose their activity and thus affect the inkjet printing effect.

[0037] In this embodiment, as Figure 3 As shown, the pulverizing assembly 6 includes a capsule chamber 61 for holding fragrance or fragrance beads, a grinding disc 62 disposed at the bottom of the capsule chamber 61, and a pulverizing wheel 63 rotatably connected to the grinding disc 62. The capsule chamber 61 is fixed inside the transverse housing 4, and a connecting channel 65 communicating with the ink storage cartridge 51 is provided at the bottom of the capsule chamber 61. Multiple grinding grooves are distributed in a ring on the grinding disc 62, and the multiple grinding grooves 621 are engaged with the pulverizing wheel 63. A rotating shaft 64 is rotatably connected to the axis of the pulverizing wheel 63.

[0038] Specifically, the capsule compartment 61 has a feeding port at its top. By feeding flavoring or fragrance beads into the feeding port, they are automatically crushed into powder by the grinding action of the crushing wheel 63 and the grinding disc 62. The powder then falls into the ink storage box 51 through the connecting channel 611 and combines with the ink. The crushing process of flavoring or fragrance beads is the same as that of coffee beans crushed in a coffee machine. Both are crushed by grinding. The grinding precision between the crushing wheel 63 and the grinding disc 62 is adjustable, so that the particle size of the flavoring or fragrance beads can be adjusted according to the actual production needs, thus facilitating their combination with the ink.

[0039] In this embodiment, the transverse housing 4 is slidably connected to the linear guide rail 312, and a fixing seat 41 for fixing the printhead 52 is provided on the bottom end of the transverse housing 4. An opening for the printhead 52 to extend through is provided at the middle position of the fixing seat 41. An adjustment component 42 for adjusting the inkjet printing angle is rotatably connected between the two side plates of the transverse housing 4.

[0040] Specifically, such as Figure 5 As shown, the adjustment assembly 42 includes an adjustment shaft 421, an adjustment cam 422, and a U-shaped adjustment block 423. The adjustment shaft 421 passes through both side plates of the transverse housing 4 and extends partially beyond the side plates. The adjustment cam 422 is sleeved on the adjustment shaft 421 and is engaged with the U-shaped adjustment block 423. The U-shaped adjustment block 423 is fixedly connected to the side plate of the transverse housing 4. During the inkjet process of the printhead 52, rotating the adjustment cam 422 causes the adjustment shaft 421 to rotate synchronously and drive the printhead 52 to move along a specific direction, thereby enabling control of the inkjet position of the printhead 52 according to requirements.

[0041] In this embodiment, as Figure 6 As shown, the microparticle suspension stirring assembly 8 includes a stirring shaft 81, stirring blades 82, and a positioning structure 83. One end of the stirring shaft 81 is connected to the micro oscillator 9 via a coupling. The stirring blades 82 are divided into upper blades and lower blades, both of which are connected to the stirring shaft 81, and the upper blades and lower blades have different cutting directions. The positioning structure 83 is disposed on the top of the stirring shaft 81 and is used to fix the stirring blades 82.

[0042] Specifically, after the pulverizing component 6 grinds and crushes the fragrance or fragrance beads, the fragrance or fragrance beads fall into the ink reservoir 51 in powder form and combine with the ink in the ink reservoir 51. Due to its incompatibility with the ink, the fragrance easily combines with the ink to form clumps, which can easily clog the nozzles when the printhead 52 is spraying ink, thus affecting the printing effect of the laundry sheets. To address this, the microparticle suspension stirring component 8 is used to stir the crushed fragrance or fragrance beads with the ink to promote rapid fusion. During the stirring process, the micro oscillator 9 built into the printhead 52 can simultaneously drive the stirring shaft 81 to rotate through the coupling, thereby driving the stirring blade 82 to rotate. Since the stirring blade 82 is designed with a cross-shaped structure, with the upper and lower blades facing different directions, the stirring blade 82 can stir and fuse ink at different depths. It can also break up the clumps of ink and fragrance or fragrance bead powder, promoting perfect fusion, so that the fragrance or fragrance bead scent is retained on the laundry sheets after inkjet printing.

[0043] To prevent ink from oxidizing during the ink ejection process onto the laundry sheet, which would result in uneven color printing, this invention adds an isolation membrane or inert gas filling space within the inkjet path formed between the printhead 52 and the laundry sheet. By placing a thin isolation membrane above the inkjet path, external air is effectively blocked from entering, reducing the chance of ink contact with air, thereby inhibiting chemical reactions and ensuring ink stability and color uniformity. The isolation membrane is a transparent polymer film that allows ink molecules to pass through but prevents air circulation, reducing the possibility of ink oxidation. Alternatively, an inert gas, such as helium or argon, can be used to fill the inkjet path, making it less likely to react with air.

[0044] The working principle of this utility model:

[0045] First, the roll of laundry detergent sheets is placed on the work platform 2. After the inkjet pattern is pre-drawn using CNC equipment, fragrance or scent beads are added to the crushing component 6, and the printing inkjet device is started. This allows the fragrance or scent beads to fully combine with the ink under the stirring action of the microparticle suspension stirring component 8. At the same time, the heating component 7 starts heating the mixed ink to promote the fusion of the fragrance or scent beads. Then, the ink is sprayed onto the laundry detergent sheet by the printhead 52. The printing position of the printhead 52 is adjusted by the dual-axis transmission mechanism so that it can spray ink according to the preset trajectory. Finally, the nozzle is cleaned periodically by the micro oscillator 9 and the micro rotating cleaning brush 10 set inside the printhead 52 to prevent the ink from drying and clogging, and to keep the spray unobstructed.

[0046] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A laundry detergent sheet printing inkjet device, comprising a frame, a work platform mounted on the frame for conveying and feeding laundry detergent sheets, and a dual-axis moving mechanism connected to the work platform for controlling the inkjet position, characterized in that, Multiple transverse moving housings are slidably connected to the dual-axis moving mechanism. Each transverse moving housing contains a printhead assembly for inkjet printing and a pulverizing assembly for grinding fragrance or scent beads. The printhead assembly is connected to the pulverizing assembly. The printhead assembly includes an ink reservoir for storing ink and a printhead for printing ink. The ink reservoir is located inside the transverse moving housing and contains a heating assembly for heating the ink and a microparticle suspension stirring assembly for mixing the ink with the fragrance or scent beads.

2. The inkjet printing device for laundry sheets according to claim 1, characterized in that, The pulverizing assembly includes a capsule chamber for holding fragrance or scent beads, a grinding disc located at the bottom of the capsule chamber, and a pulverizing wheel rotatably connected to the grinding disc. The capsule chamber is fixed inside a transverse moving housing, and a connecting channel for communicating with an ink storage cartridge is provided at the bottom of the capsule chamber. The grinding disc has multiple grinding grooves distributed in a ring, and the multiple grinding grooves are engaged with the pulverizing wheel. The pulverizing wheel is rotatably connected to a rotating shaft.

3. The inkjet printing device for laundry sheets according to claim 1, characterized in that, The microparticle suspension stirring assembly includes a stirring shaft, stirring blades, and a positioning structure. One end of the stirring shaft is connected to a micro oscillator via a coupling. The stirring blades are divided into an upper blade and a lower blade, both of which are connected to the stirring shaft, and the upper and lower blades have different cutting directions. The positioning structure is located at the top of the stirring shaft and is used to fix the stirring blades.

4. The inkjet printing device for laundry sheets according to claim 1, characterized in that, The heating assembly includes a sensor for detecting ink temperature, a heater for heating the mixed ink and fragrance or fragrance beads, and a temperature controller for controlling and adjusting the heating temperature. The sensor is located on the outer wall of the ink reservoir and is connected to the heater and the temperature controller respectively. The heater is located at the bottom of the ink reservoir and is electrically connected to the temperature controller.

5. The inkjet printing device for laundry sheets according to claim 1, characterized in that, One end of the printhead is connected to the ink reservoir, and the other end extends out of the transverse chassis. The printhead has a built-in micro rotating cleaning brush, and one end of the micro rotating cleaning brush is connected to a micro oscillator.

6. The inkjet printing device for laundry sheets according to claim 1, characterized in that, An isolation membrane or an inert gas-filled space is added to the inkjet path formed between the printhead and the laundry sheet.

7. The inkjet printing device for laundry sheets according to claim 1, characterized in that, The dual-axis moving mechanism includes a transverse moving beam, a longitudinal moving slide rail, and a drive assembly. The transverse moving beam is arranged along the width direction of the frame, and support frames are provided on both sides of the transverse moving beam. The support frames are slidably connected to the longitudinal moving slide rail. A linear guide rail is provided on the side wall of the transverse moving beam. The longitudinal moving slide rail is arranged along the length direction of the frame, and one end of the longitudinal moving slide rail is connected to the drive assembly for transmission.

8. The inkjet printing device for laundry sheets according to claim 6, characterized in that, The transverse mounting box is slidably connected to the linear guide rail, and a mounting base for fixing the printhead is provided at the bottom of the transverse mounting box. An opening for the printhead to extend through is provided at the middle position of the mounting base. An adjustment component for adjusting the inkjet printing angle is rotatably connected between the two side plates of the transverse mounting box.

9. The inkjet printing device for laundry sheets according to claim 8, characterized in that, The adjustment assembly includes an adjustment shaft, an adjustment cam, and a U-shaped adjustment block. The adjustment shaft passes through both side plates of the transverse moving chassis and extends partially beyond the side plates. The adjustment cam is sleeved on the adjustment shaft and is engaged with the U-shaped adjustment block. The U-shaped adjustment block is fixedly connected to the side plates of the transverse moving chassis.

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