Inkjet printer-based inkjet printing method

Abstract

The present invention relates to a nozzle, an inkjet printer, and an inkjet method, which include a charging plate and a plurality of deflection plates. The charging voltage of the charging plate is a fixed value, and a first ink line path for ink droplets to pass through is provided in the charging plate. Each group of deflection plates includes a positive plate and a negative plate, which are arranged face to face with each other and have a gap therebetween, and the gap is used to form a second ink line path for ink droplets to pass through. The second ink lines of the plurality of deflection plates are interconnected. The deflection plate is arranged adjacent to the charging plate, and the second ink line path is connected to the first ink line path to form a movement channel for the ink droplets. The charging voltage of the charging plate is a fixed value, so that the charge of all individual ink droplets passing through the charging plate has the same charge. During the inkjet process, the charging plate can be always in a power-on state, and the ink droplets are continuously charged, so that the printing speed of the inkjet printer is not limited, which is conducive to extending the service life of the charging plate.

Description

Technical Field

[0001] The present invention relates to the technical field of inkjet coding, and in particular to an inkjet coding method based on an inkjet coding machine. Background Art

[0002] The inkjet printer is a device that marks products in a non-contact manner, including a nozzle, ink path system, electronic system, chassis and other structures. The nozzle prints high-quality characters in a dot matrix, and is the main component of printing information, which can meet the special needs of different industries. The nozzle of the prior art splits the ink line into ink droplets through the ink chamber. The ink droplets are charged by the charging plate. The charged ink droplets enter between two oppositely arranged deflection plates, deflected by the electric field force, pass through the ink outlet and fall onto the product, and print the required mark in coordination with the movement of the product. The uncharged ink droplets enter the recovery tube for reuse.

[0003] The printhead of a traditional inkjet printer has the following defects: First, when the charging plate charges the ink droplets, the falling interval of each ink droplet must be greater than or equal to the charging time for the charging plate to charge the ink droplets to the maximum charge amount, thereby limiting the printing speed of the inkjet printer. Second, during the printing process, the charging plate needs to continuously perform the "on→charge→off" process for different lengths of time, which damages the workload and service life of the charging plate. Summary of the invention

[0004] Based on this, it is necessary to provide a nozzle and inkjet printer to address the above technical problems, which can reduce the restrictions on the printing speed of the inkjet printer, reduce the workload of the charging plate, and extend the service life of the charging plate.

[0005] A nozzle, comprising:

[0006] A charging plate, wherein the charging plate is provided with a first ink line channel for ink droplets to pass through;

[0007] A plurality of groups of deflection plates, each group of the deflection plates comprises a positive plate and a negative plate, the positive plate and the negative plate are arranged face to face with each other with a gap therebetween, the gap is used to form a second ink path for the ink droplets to pass through; the second ink paths of the plurality of groups of the deflection plates are interconnected; the deflection plates are arranged adjacent to the charging plates, the second ink paths are connected to the first ink paths to form a movement channel for the ink droplets.

[0008] The technical solution is further described below:

[0009] In one embodiment, the first ink line channel and the second ink line channel are connected to form a linear channel.

[0010] In one embodiment, the number of groups of the deflection plates is equal to the number of dot matrixes of the inkjet printer.

[0011] In one embodiment, the positive electrode plate and the negative electrode plate are arranged in parallel, the positive electrode plate is arranged on one side of the second ink line, and the negative electrode plate is arranged on the other side of the second ink line.

[0012] In one embodiment, the distances between the positive plates and the negative plates of each group of the deflection plates are equal.

[0013] In one embodiment, the charging plate includes two metal plates disposed face to face with each other, and the first ink channel is formed between the two metal plates.

[0014] In one embodiment, the nozzle also includes a crystal oscillator module, which is arranged on a side of the charging plate away from the deflection plate. The crystal oscillator module is provided with a nozzle and an ink outlet pipe, the ink outlet pipe is used to input ink into the crystal oscillator module, and the nozzle is used to spray the ink into the first ink line of the charging plate.

[0015] In one embodiment, the nozzle further includes a recovery pipe, one end of which is disposed toward the second ink channel for receiving ink drops from the deflection plate; and the other end of the recovery pipe is connected to the ink outlet pipe.

[0016] In one of the embodiments, the nozzle further includes an observation lamp, which is disposed between the charging plate and the deflection plate. An opening is disposed in the observation lamp, and the ink droplets enter the deflection plate from the charging plate through the opening.

[0017] In one of the embodiments, the nozzle further includes a shell, and the charging plate, the deflection plate and the observation light are all disposed in the shell.

[0018] In one embodiment, a printer includes the print head as described above.

[0019] In one embodiment, a coding method of the inkjet printer as described above comprises the following steps:

[0020] Power is supplied to the charging plate. During the charging process, the charging voltage of the charging plate in the nozzle is kept constant;

[0021] Power the crystal oscillator module in the print head, open the ink outlet pipe of the crystal oscillator module, and supply ink to the crystal oscillator module;

[0022] The deflection plates of the corresponding group are energized according to the printing position of the object to be printed, and when the ink droplets pass through the deflection plates of the corresponding group, the deflection plates of the corresponding group remain energized.

[0023] In one embodiment, in the step of energizing the deflection plates of the corresponding group according to the printing position of the object to be printed, the printing position includes a blank area and a printing area, and the step specifically includes:

[0024] Determining whether the printing position is in a blank area or a printing area;

[0025] For the blank area, the deflection plates in each group are not powered;

[0026] For the printing area, the relationship between the printing area and each group of deflection plates is:

[0027] When the deflection plate closest to the object to be printed is energized, the ink dot falls to the first position; when the deflection plate farthest from the object to be printed is energized, the ink dot falls to the second position; in the same column of ink dots on the printed object, the Xth ink dot represents the Xth ink dot from the first position to the second position, and the ink dot at the first position is the first ink dot; the Nth group of deflection plates represents the Nth group of deflection plates from the direction close to the object to be printed to the direction far from the object to be printed, the deflection plate closest to the object to be printed is the first group of deflection plates, and the deflection plate farthest from the object to be printed is the last group of deflection plates; the Xth ink dot corresponds to the Nth group of deflection plates that are charged, where X=N, and when the Xth ink dot passes through the Nth group of deflection plates, the Nth group of deflection plates remains energized.

[0028] The above-mentioned nozzle, inkjet printer and inkjet method have at least the following beneficial effects:

[0029] The nozzle provided in this embodiment includes a charging plate and a deflection plate. In this embodiment, multiple groups of deflection plates are arranged at positions adjacent to the charging plates, and the second ink line path of each group of deflection plates is connected to the first ink line path, and the ink droplets enter the second ink line path from the first ink line path. Multiple groups of deflection plates intermittently charge the ink droplets to achieve the purpose of deflecting the falling trajectory of the charged ink droplets and causing them to fall to a designated location. In the above process, the charging plate can be charged with a fixed voltage so that all single ink droplets passing through the charging plate have the same charge, so that the charge amount of each ink droplet is the same. The charging plate can be always in a power-on state and charge the ink droplets uninterruptedly, that is, the charging plate does not need to cycle through the steps of opening, charging, and closing, so that the printing speed of the inkjet printer is not limited, which is beneficial to extending the service life of the charging plate. In addition, multiple groups of deflection plates intermittently charge the charged ink droplets, change the falling trajectory of the charged ink droplets, and cause them to fall to a designated location, thereby achieving accurate inkjet printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of a cross-sectional exploded structure of a nozzle provided in one embodiment of the present invention;

[0031] Figure 2 for Figure 1 A front view of

[0032] Figure 3 A schematic diagram of the structure of a crystal oscillator module provided in one embodiment of the present invention.

[0033] Explanation of the reference numerals: 100, nozzle; 110, housing; 120, charging plate; 121, first ink line; 130, deflection plate; 131, positive plate; 132, negative plate; 133, second ink line; 140, crystal oscillator module; 141, nozzle; 142, ink outlet pipe; 143, crystal oscillator element; 144, pressurized ink chamber; 145, one-way valve; 150, recovery pipe; 160, observation light; 161, opening. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0035] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The various technical features of the above-described embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the various technical features in the above-described embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] This embodiment provides a nozzle 100 and an inkjet printer, which have the advantages of reducing the restriction on the printing speed of the inkjet printer, reducing the workload of the charging plate 120, and extending the service life of the charging plate 120, which will be described in detail below with reference to the accompanying drawings.

[0038] In one embodiment, see Figures 1 to 3A nozzle 100 and a printer include a charging plate 120 and a plurality of deflection plates 130. During specific operation, the charging voltage of the charging plate 120 can be operated at a fixed voltage value, and a first ink line channel 121 for ink droplets to pass through is provided in the charging plate 120. Each group of deflection plates 130 includes a positive plate 131 and a negative plate 132, and the positive plate 131 and the negative plate 132 are arranged face to face with a gap therebetween, and the gap is used to form a second ink line channel 133 for ink droplets to pass through. The second ink line channels 133 of the plurality of deflection plates 130 are interconnected. The deflection plate 130 is arranged adjacent to the charging plate 120, and the second ink line channel 133 is connected to the first ink line channel 121 to form a movement channel for ink droplets.

[0039] In this embodiment, multiple groups of deflection plates 130 are arranged at positions adjacent to the charging plates 120. The second ink line 133 of each group of deflection plates 130 is connected to the first ink line 121, and the ink droplets enter the second ink line 133 from the first ink line 121. Multiple groups of deflection plates 130 intermittently charge the ink droplets, so as to deflect the falling trajectory of the charged ink droplets and make them fall to the designated location. In the above process, the charging plate 120 can be charged with a fixed voltage, so that all the single ink droplets passing through the charging plate 120 have the same charge, so that the charge of each ink droplet is the same. The charging plate 120 can be always in the power-on state and charge the ink droplets uninterruptedly, that is, the charging plate 120 does not need to go through the cycle of opening, charging, closing and other steps, so that the printing speed of the inkjet printer is not limited, which is conducive to extending the service life of the charging plate 120. In addition, multiple groups of deflection plates 130 intermittently charge the charged ink droplets, change the falling trajectory of the charged ink droplets, and make them fall to the designated location to achieve accurate coding.

[0040] In one embodiment, see Figure 1 and Figure 2 , the first ink line channel 121 and the second ink line channel 133 form a linear channel. Specifically, each group of deflection plates 130 is sequentially arranged directly below the charging plate 120, so that the first ink line channel 121 in the charging plate 120 and the second ink line channel 133 of each group of deflection plates 130 are in a straight line, which is conducive to the smooth entry of ink droplets from the first ink line channel 121 into the second ink line channel 133.

[0041] In one embodiment, see Figure 1 and Figure 2, the positive plate 131 and the negative plate 132 are arranged in parallel, the positive plate 131 is arranged on one side of the second ink line 133, and the negative plate 132 is arranged on the other side of the second ink line 133. Specifically, the positive plates 131 of the multiple groups of deflection plates 130 are all arranged on the same side of the second ink line 133, and the negative plates 132 of the multiple groups of deflection plates 130 are all arranged on the other side of the second ink line 133. Further, the distances between the positive plates 131 and the negative plates 132 of the deflection plates 130 are all equal, so that when the multiple groups of deflection plates 130 are all powered on, the electric field distribution between each group of deflection plates 130 is exactly the same, that is, the charged ink droplets are subjected to the same force in the electric field of each group of deflection plates 130. In addition, a uniform electric field is formed between the positive plates 131 and the negative plates 132 of each group of deflection plates 130. The setting of a uniform electric field makes it easy to deduce the regular movement of ink droplets, and then the movement of ink droplets can be easily controlled by adjusting the magnitude of the field strength.

[0042] In one embodiment, see Figure 1 and Figure 2 , the number of deflection plates 130 is equal to the dot matrix of the inkjet printer. Specifically, in actual production applications, the inkjet printer with a maximum printing height of 32 dot matrix (maximum printing height is 32 dot matrix, that is, the printing height range is 6.5-27㎜) has 32 groups of deflection plates 130 set in its nozzle 100; the inkjet printer with a maximum printing height of 16 dot matrix (maximum printing height is 16 dot matrix, that is, the printing height range is 6.5-12㎜) has 16 groups of deflection plates 130 set in its nozzle 100, and other situations are similar and will not be described in detail here.

[0043] In one embodiment, see Figure 1 and Figure 2 The charging plate 120 includes two metal plates arranged face to face, and a first ink channel 121 is formed between the two metal plates. When the charging plate 120 is powered on, the metal plates are positively charged. Specifically, after the charging plate 120 is charged, both metal plates of the charging plate 120 are positively charged. When the ink droplets move into the first ink channel 121, the positive charge of the ink droplets is repelled by the positive charge carried by the metal plates of the charging plate 120, so that the ink droplets are finally negatively charged in the charging plate 120. The charging voltage of the charging plate 120 is set to be constant, and on the premise that the size of each ink droplet is the same, the charge amount of each ink droplet is also the same.

[0044] In one embodiment, see Figures 1 to 3The nozzle 100 further includes a crystal oscillator module 140, which is disposed on a side of the charging plate 120 away from the deflection plate 130. The crystal oscillator module 140 is provided with a nozzle 141 and an ink outlet pipe 142. The ink outlet pipe 142 is used to input ink into the crystal oscillator module 140, and the nozzle 141 is used to spray the ink into the first ink line 121 of the charging plate 120. Further, the crystal oscillator module 140 further includes a crystal oscillator element 143, which is used to vibrate in the nozzle 141 to separate ink droplets. A pressurized ink chamber 144 is provided inside the crystal oscillator module 140.

[0045] Specifically, see Figures 1 to 3 The ink outlet pipe 142 is connected to the pressurized ink chamber 144 and transports ink droplets to the pressurized ink chamber 144, which is filled with ink and has a constant hydraulic pressure. A one-way valve 145 is provided at the end of the ink outlet pipe 142 close to the pressurized ink chamber 144. The one-way valve 145 only allows the ink to flow from the inside of the inkjet printer to the pressurized ink chamber 144 in one direction to prevent the ink from flowing back. In addition, the ink enters the pressurized ink chamber 144 from the inside of the inkjet printer through the ink outlet pipe 142 and cannot flow back due to the one-way valve 145. According to Bernoulli's principle, the flow rate of the ink in the ink outlet pipe 142 is greater than the flow rate in the pressurized ink chamber 144, and the pressure in the pressurized ink chamber 144 will increase, so that the effect of increasing the hydraulic pressure inside the pressurized ink chamber 144 can be achieved. The nozzle 141 is a small-sized circular hole located at the bottom of the pressurized ink cavity 144, and the diameter of the circular hole is 25μm to 75μm (depending on the model of the inkjet printer). The crystal oscillator 143 is a cylindrical crystal made of special material, which is immersed in the pressurized ink cavity 144 and completely blocks the nozzle 141 in a static state. When the crystal oscillator 143 is started, it will vibrate at a high frequency (such as 62500Hz, the specific vibration frequency depends on the model of the inkjet printer), and the ink in the pressurized ink cavity 144 will flow out from the nozzle 141 intermittently under the action of hydraulic pressure, and move downward in the shape of ink droplets under the action of hydraulic pressure and gravity. When the ink droplets just leave the nozzle 141, the ink droplets are roughly circular and stick to each other; in the subsequent movement process, the ink droplets are affected by air resistance and gravity, and their shape will generally tend to be drop-shaped, and adjacent ink droplets are completely separated and do not stick to each other.

[0046] For further information, see Figures 1 to 3The nozzle 100 also includes a grounding wire (not shown), one end of which is connected to the crystal oscillator module 140, and the other end is grounded. The conductive metal plate of the charging plate 120 (for example, the electric plate is a pair of 5mm*1mm conductive metal plates) is installed directly below the crystal oscillator module 140. For example, the distance from the charging plate 120 to the crystal oscillator module 140 is 10mm. Due to the influence of gravity, the ink droplets are still in a partially adhered state when they enter the first ink line 121 of the charging plate 120 from the nozzle 141, but they are completely disconnected and become completely separated ink droplets when they leave the first ink line 121 of the charging plate 120. Specifically, when the charging plate 120 is charged, the conductive metal plate of the charging plate 120 is positively charged. Part of the positive charge of the ink droplets is repelled by the positive charge carried by the charging plate and is led out along the grounding wire, so that the ink droplets are negatively charged after complete separation. When the charging voltage of the charging plate 120 is set to be constant, and the hydraulic pressure of the pressurized ink chamber 144 and the vibration frequency of the crystal oscillator element 143 are both unchanged, the size, speed and charge carried by each drop of ink will remain the same. Furthermore, the deflection plate 130 is arranged directly below the charging plate 120, for example, the deflection plate 130 is arranged 10 mm directly below the charging plate 120. The ink droplets coming out of the first ink line 121 carry a negative charge, and then enter the second ink line 133 in the deflection plate 130, and are deflected under the action of the electric field force of the uniform electric field in the second ink line 133, and finally fall to the designated location to achieve accurate coding.

[0047] In one embodiment, see Figures 1 to 3 The nozzle 100 further includes a recovery pipe 150, one end of which is disposed toward the second ink line 133, for receiving ink droplets from the deflection plate 130. The other end of the recovery pipe 150 is connected to the ink outlet pipe 142. Specifically, the nozzle of the recovery pipe 150 is aligned with the trajectory of the ink droplets when they come out of the nozzle 141 and fall vertically. When the falling ink droplets are not needed (i.e., the printed information contains blank spots, and no ink droplets are required to attach), the deflection plate 130 will not be energized during the vertical falling of the ink droplets, so the ink droplets will not be affected by the electric field force, and the ink droplets will not be deflected toward the direction of the positive plate 131, but will remain in a vertical falling state and eventually fall into the nozzle of the recovery pipe 150, and then be transported back to the pressurized ink chamber 144 for reuse. The provision of the recovery pipe 150 is conducive to recovering the unwanted ink droplets into the pressurized ink chamber 144, effectively preventing the unwanted ink droplets from splashing on the surface of the printed object, causing the printed information to be contaminated and the ink to be wasted.

[0048] In one embodiment, see Figure 1 and Figure 2The nozzle 100 also includes an observation light 160, which is disposed between the charging plate 120 and the deflection plate 130. An opening 161 is disposed in the observation light 160, and the ink droplets enter the deflection plate 130 from the charging plate 120 through the opening 161. The observation light 160 is a round green LED lamp, which is installed directly below the charging plate 120. The ink droplet observation light 160 serves as a bottom light source, so that the operator can observe through a handheld magnifying glass whether the shape of the ink droplets after complete separation meets the required standards. Generally speaking, ink droplets that meet the required standards should be drop-shaped, and adjacent ink droplets should be completely disconnected and not adhered, and the movement of the ink droplets can be clearly observed. If the operator observes that the shape of the ink droplets does not meet the required standards, the operator can try to change the shape of the ink droplets to meet the required standards by adjusting the vibration frequency of the crystal oscillator element 143 in the pressurized ink chamber 144.

[0049] See also Figure 1 The nozzle 100 also includes a housing 110, which mainly includes a stainless steel shell and a plastic fixing component. The stainless steel shell is mainly used to protect the internal components and circuit boards during use to prevent external impact and water vapor. The plastic fixing component is used to fix and seal the internal circuit board, and the crystal oscillator module 140, the charging plate 120, the observation lamp 160, the deflection plate 130, and the recovery pipe 150 are all installed and fixed in the housing 110.

[0050] In one embodiment, a printer includes the nozzle 100 as described in any of the above embodiments. Since the printer includes the nozzle 100 described above, the technical effect is brought by the nozzle 100, and the beneficial effect has included the beneficial effect of the nozzle 100, so it is not repeated here.

[0051] In one embodiment, see Figures 1 to 3 , the inkjet printer's inkjet printing method specifically includes:

[0052] Step S1, power the charging plate 120. During the charging process, the charging voltage of the charging plate 120 in the nozzle 100 is kept constant. In this step, the charging plate 120 is charged with a constant voltage, so that all individual ink droplets passing through the charging plate 120 have the same charge, so that the charge of each ink droplet is the same. The charging plate 120 can be always in a power-on state and charge the ink droplets uninterruptedly, that is, the charging plate 120 does not need to go through the cycle of opening, charging, closing and other steps, so that the printing speed of the inkjet printer is not limited, which is conducive to extending the service life of the charging plate 120.

[0053] Step S2, power the crystal oscillator module in the nozzle, and open the ink outlet pipe of the crystal oscillator module to supply ink to the crystal oscillator module. In this step, the ink outlet pipe 142 is used to input ink into the crystal oscillator module 140, and the nozzle 141 is used to spray the ink into the first ink line 121 of the charging plate 120. Furthermore, the crystal oscillator module 140 also includes a crystal oscillator element 143, which vibrates in the nozzle 141 after the crystal oscillator module is powered on to separate ink droplets.

[0054] Step S3, energizing the deflection plates 130 of the corresponding group according to the printing position of the object to be printed, and when the ink droplets pass through the deflection plates 130 of the corresponding group, the deflection plates 130 of the corresponding group remain energized.

[0055] The printing position includes a blank area and a printing area. The blank area refers to the area where no coding is required, and the printing area refers to the area where ink is required.

[0056] In this step, it is first determined whether the printing position is in the blank area or the printing area. For the blank area, each group of deflection plates 130 is not powered. For the printing area, the relationship between the final printing position of the ink dot and the power supply of the deflection plate 130 is as follows: when the deflection plate 130 closest to the object to be printed is powered on, the ink dot falls to the first position; when the deflection plate 130 farthest from the object to be printed is powered on, the ink dot falls to the second position; in the same column of ink dots on the printed object, the Xth ink dot represents the Xth ink dot from the first position to the second position, the ink dot at the first position is the first ink dot, and the Nth group of deflection plates 130 represents the Nth group of deflection plates 130 from the direction close to the object to be printed to the direction far from the object to be printed; the deflection plate 130 closest to the object to be printed is the first group of deflection plates 130, and the deflection plate 130 farthest from the object to be printed is the last group of deflection plates 130; the Xth ink dot corresponds to the nth group of deflection plates 130 being powered, where X = N. And when the Xth ink dot passes through the Nth group of deflection plates, the Nth group of deflection plates remains powered on.

[0057] The following is a detailed description of the use of the deflection plate 130:

[0058] See also Figure 1 and Figure 2, multiple groups of deflection plates 130 are installed directly below the charging plate 120. Each group of deflection plates 130 is composed of a positive plate 131 and a negative plate 132, both of which are conductive metal plates, and the distance between adjacent groups of deflection plates 130 can be a fixed value, such as 0.5mm, 0.6mm; multiple groups of deflection plates 130 are arranged in sequence directly below the charging plate 120, and their respective positive plates 131 are located on the left side of the second ink line 133, and their respective negative plates 132 are located on the right side of the second ink line 133. Theoretically, the number of groups of deflection plates 130 is equal to the number of dot arrays that the inkjet printer allows to print (the number of dot arrays is the maximum printing height of the inkjet printer). For example, a printer with a maximum printing height of 32 dots has 32 segments of charged deflection plates 130 in its nozzle 100; a printer with a maximum printing height of 16 dots has 16 segments of charged deflection plates 130 in its nozzle 100. After being energized, the positive plate 131 and the negative plate 132 respectively carry high voltages (for example, the positive plate 131 carries +3800V, and the negative plate 132 carries -3800V); when the positive and negative plates 132 are not energized, neither carries voltage. When a charged ink droplet passes through the middle of a specific charged deflection plate 130 during its fall, there is a potential difference between the positive plate 131 and the negative plate 132 of the charged deflection plate 130, and a uniform electric field is formed in the middle area of ​​the charged deflection plate 130. The charged ink droplets are affected by the electric field force in the uniform electric field and generate acceleration in the horizontal direction. The negatively charged ink droplets are affected by the electric field force and thus have a horizontal speed pointing to the positive plate 131 (to the left). At the same time, the charged deflection plate 130 is closed or kept open according to the landing position of the next charged ink droplet. Different groups of deflection plates 130 can be controlled to be in an energized state or an unenergized state respectively, so that each charged ink dot can be given a speed to the left. During the movement of each ink dot, since the time it takes to pass through multiple groups of deflection plates 130 is very short, the speed change caused by gravity can be ignored. In theory, each ink dot can be regarded as passing through each group of deflection plates 130 at a uniform speed. The relationship between the ink dots and whether the multiple deflection plates 130 are powered is as follows: if the ink dots are not needed for printing, then during the process of the ink dots passing through the multiple deflection plates 130 at a uniform speed, each deflection plate 130 remains in a non-powered state, and the ink dots have no speed in the horizontal direction, so that they eventually enter the ink drop recovery pipe 150 and return to the pressurized ink chamber 144; if the ink dots are needed for printing, then during the process of the ink dots passing through the multiple deflection plates 130 at a uniform speed, a specific deflection plate 130 will become powered, so that the ink dots obtain a speed in the horizontal direction, so that they eventually fall to the designated printing position. In the above process, the relationship between the final printing position of the ink dots and the specific powered deflection plates 130 is as follows: in the same column of ink dots of the printing information, the Xth ink dot represents the Xth ink dot from right to left. That is, the rightmost end is the first ink dot, and the leftmost end is the last one. The Nth group of deflection plates 130 represents the Nth group of deflection plates 130 from bottom to top.That is, the deflection plate 130 farthest from the charging plate 120 is recorded as the first group of deflection plates 130, and the deflection plate 130 closest to the charging plate 120 is recorded as the last group of deflection plates 130. Specifically, the Xth ink dot corresponds to the Nth group of deflection plates 130, where X=N. That is, when X=N=1, the first ink dot from right to left corresponds to the first group of deflection plates 130 from bottom to top; when X=N=2, the second ink dot from right to left corresponds to the second group of deflection plates 130 from bottom to top. The charging of the deflection plates 130 corresponding to other ink dots is similar and will not be described here.

[0059] The nozzle 100 provided in this embodiment includes a charging plate 120, and the charging voltage of the charging plate 120 is a fixed value, so that the charge of all single ink droplets passing through the charging plate 120 is the same, so that the charge of each ink droplet is the same. In this embodiment, multiple groups of deflection plates 130 are arranged at the positions adjacent to the charging plates 120, and the second ink line 133 of each group of deflection plates 130 is connected to the first ink line 121, and the ink droplets enter the second ink line 133 from the first ink line 121. Multiple groups of deflection plates 130 intermittently charge the ink droplets, so as to deflect the falling trajectory of the charged ink droplets and fall to the designated location. In the above process, the charging plate 120 can be always in the power-on state and charge the ink droplets uninterruptedly, that is, the charging plate 120 does not need to go through the cycle of the steps of opening, charging, and closing, so that the printing speed of the inkjet printer is not limited, which is conducive to extending the service life of the charging plate 120. In addition, multiple groups of deflection plates 130 intermittently charge the charged ink droplets, change the falling trajectory of the charged ink droplets, and make them fall to the designated location, thereby achieving accurate coding.

[0060] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A coding method based on a coding machine, characterized in that: The inkjet printer includes a nozzle; the nozzle includes: A charging plate, wherein the charging plate is provided with a first ink line channel for ink droplets to pass through; A plurality of groups of deflection plates, each group of the deflection plates comprising a positive plate and a negative plate, the positive plate and the negative plate are arranged face to face with a gap therebetween, the gap being used to form a second ink path for the ink droplets to pass through; the second ink paths of the plurality of groups of the deflection plates are interconnected; the second ink paths are connected to the first ink paths to form a movement channel for the ink droplets; An observation lamp, the observation lamp is arranged between the charging plate and the deflection plate, the observation lamp is provided with an opening, and the ink droplets enter the deflection plate from the charging plate through the opening; The nozzle further comprises a crystal oscillator module and a shell, wherein the crystal oscillator module is arranged on a side of the charging plate away from the deflection plate, the crystal oscillator module is provided with a nozzle and an ink outlet pipe, the ink outlet pipe is used to input ink into the crystal oscillator module, and the nozzle is used to spray the ink into the first ink line of the charging plate; the crystal oscillator module comprises a crystal oscillator element, and a pressurized ink cavity is arranged inside the crystal oscillator module, the pressurized ink cavity is filled with ink and has a constant hydraulic pressure; after the crystal oscillator element is started, it vibrates at a high frequency, so that the ink in the pressurized ink cavity flows out intermittently from the nozzle under the action of the hydraulic pressure; A grounding wire, one end of which is connected to the crystal oscillator module of the nozzle, and the other end of which is grounded; The method comprises: supplying power to the charging plate, wherein during the charging process, the charging voltage of the charging plate in the nozzle is kept constant; Power the crystal oscillator module in the print head, open the ink outlet pipe of the crystal oscillator module, and supply ink to the crystal oscillator module; The deflection plates of the corresponding group are energized according to the printing position of the object to be printed, and when the ink droplets pass through the deflection plates of the corresponding group, the deflection plates of the corresponding group remain energized; the printing position includes a blank area and a printing area; The step of energizing the corresponding group of deflection plates according to the printing position of the object to be printed comprises: determining whether the printing position is in a blank area or a printing area; For the blank area, the deflection plates in each group are not powered; For the printing area, the relationship between the printing area and each group of deflection plates is: When the deflection plate closest to the object to be printed is energized, the ink dot falls to the first position; when the deflection plate farthest from the object to be printed is energized, the ink dot falls to the second position; in the same column of ink dots on the printed object, the Xth ink dot represents the Xth ink dot from the first position to the second position, and the ink dot at the first position is the first ink dot; the Nth group of deflection plates represents the Nth group of deflection plates from the direction close to the object to be printed to the direction far away from the object to be printed, the deflection plate closest to the object to be printed is the first group of deflection plates, and the deflection plate farthest from the object to be printed is the last group of deflection plates; the Xth ink dot corresponds to the Nth group of deflection plates that are charged, where X=N, and when the Xth ink dot passes through the Nth group of deflection plates, the Nth group of deflection plates remains energized.

2. The method according to claim 1, characterized in that: The first ink line channel and the second ink line channel are connected to form a linear channel.

3. The method according to claim 1, characterized in that The number of groups of the deflection plates is equal to the number of dot matrixes of the inkjet printer.

4. The method according to claim 1, characterized in that The positive electrode plate and the negative electrode plate are arranged in parallel, the positive electrode plate is arranged on one side of the second ink line channel, and the negative electrode plate is arranged on the other side of the second ink line channel.

5. The method according to claim 1, characterized in that The distances between the positive plates and the negative plates of each group of the deflection plates are equal.

6. The method according to claim 1, characterized in that The charging plate includes two metal plates arranged face to face with each other, and the first ink channel is formed between the two metal plates.

7. The method according to claim 1, characterized in that The nozzle also includes a recovery pipe, one end of which is arranged toward the second ink channel for receiving ink drops from the deflection plate; the other end of the recovery pipe is connected to the ink outlet pipe.

8. The method according to claim 1, characterized in that A one-way valve is provided at the end of the ink outlet pipe close to the pressurized ink chamber, and the one-way valve allows ink to flow from the inside of the inkjet printer to the pressurized ink chamber in one direction.

9. The method according to claim 1, characterized in that: The charging plate, the deflection plate and the observation light are all arranged in the shell, and the shell includes a stainless steel shell and a plastic fixing component.

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