CN114728521B - Ink jet recording apparatus - Google Patents

Abstract

The present invention provides an inkjet recording apparatus having a print head that realizes high-precision positioning of charged electrodes and reduces the number of parts. An inkjet recording device includes a main body that supplies ink, and a print head that performs printing by receiving the supply of ink. The print head includes: nozzles that eject ink; an orifice assembly through which ink particles ejected from the nozzles and granulated are passed; and a charging electrode that charges the ink particles that have passed through the orifice assembly. The charging electrode block has a groove for inserting the charging electrode at the center. The charging electrode is made of an elastic body, and a bent portion is provided at an end thereof. The charging electrode is inserted into the groove of the charging electrode block, and the charging electrode block, the hole assembly and the nozzle are integrated with an integrated fixing screw.

Description

inkjet recording device

technical field

The present invention relates to an inkjet recording device.

Background technique

An industrial inkjet recording device uses a pump in the main body to supply ink to the nozzles in the print head, the ink is ejected from the hole at the tip of the nozzle, and the granulated ink (ink particles) is charged during flight. Printing is performed by flying the ink while being deflected. Ink not used for printing is collected and pumped back into the main body. Charging of the ink particles is performed by applying a voltage to a charging electrode provided midway through which the ink particles ejected from the nozzles pass. In this case, since the diameter of the granulated and flying ink particles is about 0.1 mm, high accuracy is required for the shape and arrangement position of the charging electrode.

As a print head of an inkjet recording device that positions the charging electrode with such high precision, for example, a technique disclosed in Japanese Patent Application Laid-Open No. 2017-132165 (Patent Document 1) is known. The print head in this patent document 1 includes: a charged electrode block body with a charged electrode fixed thereon; a charged electrode back cover between the charged electrode block body and the hole; The opposite side of the back cover and fix the charged electrode front cover of the charged electrode block, these charged electrode blocks, the charged electrode back cover and the charged electrode front cover are integrated, and the charged electrode and the hole are connected with the charged electrode. The nozzle is formed in one piece. That is, the charged electrode block with the charged electrode is integrally formed with the charged electrode back cover and the charged electrode front cover arranged at the front and back of the charged electrode block, thereby improving the accuracy of the installation position of the charged electrode, and realizing a print with stable printing quality. ink recording device.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2017-132165

Contents of the invention

The problem to be solved by the invention

According to the technology of the above-mentioned Patent Document 1, the positioning of the charged electrodes can be made highly accurate, and high-quality printing can be realized.

However, this technique requires a charging electrode block, a charging electrode back cover, and the charging electrode front cover in order to position the charging electrode with high precision. Therefore, there is a problem that the number of parts increases and the cost becomes high. In addition, due to the large number of parts, dismantling (disassembly) of the print head when the print head is disassembled for cleaning and inspection, and assembly work for reassembling the print head after cleaning and inspection are time-consuming.

Accordingly, an object of the present invention is to provide an inkjet recording apparatus having a print head that achieves highly accurate positioning of charging electrodes and reduces the number of parts.

means to solve the problem

In order to achieve the above object, an example of the present invention is an inkjet recording device, which includes a main body that supplies ink and a printing head that receives the supply of ink and prints, and the printing head includes: nozzles that eject ink; an orifice assembly through which granulated ink particles ejected from the nozzles pass; and a charging electrode for charging the ink particles passing through the orifice assembly, the inkjet recording apparatus includes a block-shaped charging electrode having a groove at a central portion thereof. An electrode block, in a state where the charged electrode is inserted into the groove of the charged electrode block, uses elastic force to press the side of the groove and the charged electrode, the charged electrode block, the hole The assembly is integral with the nozzle.

Other configurations of the present invention will be clarified from the description of the embodiments described later.

Invention effect

According to the present invention, it is possible to provide an inkjet recording apparatus having a print head which achieves highly accurate positioning of charged electrodes and reduces the number of parts.

Description of drawings

FIG. 1 is an overall appearance view of an inkjet recording apparatus according to Embodiment 1 of the present invention.

Fig. 2 is a perspective view showing a print head according to Embodiment 1 of the present invention.

Fig. 3 is an exploded perspective view of the print head according to Embodiment 1 of the present invention.

FIG. 4 is a diagram showing a front view, a top view, and a side view of the print head of FIG. 2 .

5 is a perspective view of a charging electrode and a charging electrode block in Embodiment 1 of the present invention.

6 is a diagram showing a front view, a plan view, and a left side view of the charging electrode and the charging electrode block shown in FIG. 5 .

Fig. 7 is a diagram showing a charging electrode and a charging electrode block in Example 2 of the present invention.

Fig. 8 is a diagram showing a charging electrode and a charging electrode block in Example 3 of the present invention.

Fig. 9 is a diagram showing a charging electrode and a charging electrode block in Example 4 of the present invention.

Detailed ways

Hereinafter, specific examples of the present invention will be described using the drawings. In addition, this invention is not limited to the Example demonstrated below. In addition, in each of the following figures, the same reference numerals (symbols) are assigned to the same devices, and the description of the devices already explained may be omitted.

Example 1

Embodiment 1 of the present invention will be described using FIGS. 1 to 6 . Here, FIG. 1 is an overall appearance view of an inkjet recording apparatus, FIG. 2 is a diagram showing a print head in Embodiment 1 of the present invention, FIG. 3 is an exploded view of the print head, and FIG. 4 is a front view of the print head. , a top view, and a left side view, FIG. 5 is a diagram of the charged electrode and a charged electrode block of Embodiment 1, and FIG. 6 is a front view, a top view, and a left side view of FIG. 5 .

(Overall Structure of Inkjet Recording Apparatus)

First, the overall configuration of the inkjet recording apparatus will be described using FIG. 1 .

In FIG. 1 , an inkjet recording device 100 has a main body 101 , a cable 102 , a print head 103 , and a control unit 104 . Inside the main body 101 are provided: an ink container for supplying ink; a supply path; a solenoid valve and a pump provided in the middle of the supply path; a recovery path for recovering unused ink; a solenoid valve and a pump provided in the middle of the recovery path wait. Ink is supplied to printhead 103 via a path within cable 102 . In the print head 103 , the supplied ink is granulated and ejected from the nozzles, and the ink particles are charged with a voltage corresponding to a character to be printed by the charging electrodes. Then, the ink is deflected according to the charge amount by the deflection electrode, flies to the printed matter, and prints. Ink that is not used for printing is captured (trapped) into the gutters, recycled from the printhead 103 to an ink container within the main body 101 via a path within the cable 102 . The control unit 104 has a power supply, a substrate, and an operation panel. The control unit 104 performs overall control such as supply of power required for printing by the inkjet recording device, transmission of various signals required for printing by the inkjet recording device, and reception of signals from sensors or the like outside the control unit.

In addition, the gist of the present invention is the constituent part of the print head 103 of the inkjet recording apparatus 100 , so the following description will focus on the structure and arrangement of the print head 103 in Embodiment 1 of the present invention.

(Structure and configuration of print head)

Next, the structure and arrangement of the print head according to Embodiment 1 of the present invention will be described with reference to FIGS. 2 to 5 . As mentioned above, Fig. 2 is a perspective view of a print head. Fig. 3 is an exploded perspective view of main parts of the print head. 4 shows a front view, an upper surface portion, and a left side view of the print head shown in FIG. 2, (A) is a front view of the print head, (B) is a top view, and (C) is a Diagram of the left view. In addition, in FIG. 4 , description of the nozzle guard 6 in FIG. 2 is omitted. Fig. 5 is a perspective view of a charged electrode and a charged electrode block.

In FIG. 2 , the nozzle main body 1 shown in FIGS. 3 and 4 is provided in the nozzle guard 6 . Here, the nozzle main body 1 is sometimes simply referred to as a "nozzle". Ink particles ejected from the nozzle body 1 pass through the inner side of the charging electrode 11 . A voltage is applied to the charging electrode 11 for passing ink particles, whereby each ink particle is charged according to the applied voltage. In this Embodiment 1, as shown in FIG. 5 , the charging electrode 11 is inserted into the groove 10 c of the charging electrode block 10 . In addition, as shown in FIG. 3 , the charged electrode block 10 , the hole assembly 9 and the O-ring 8 are fixed to the nozzle main body 1 by integral fixing screws (or threaded parts such as bolts) 12 a - 12 d. The nozzle guard 6 is fixed by nozzle guard fixing screws 16a to 16c. In addition, these constituent devices are fixed to the base 23 by nozzle base fixing screws 21 . The horizontal adjustment screw 17 and the horizontal adjustment spring 18 are provided for adjusting the horizontal direction of the ink jet. The vertical adjustment screw 19 and the vertical adjustment spring 20 (not shown in FIG. 2 , see FIG. 4 ) are provided to adjust the vertical direction of the ink jet.

As shown in FIG. 3 , an electrostrictive element 2 , a weight 3 , an ink supply tube 4 and an ink recovery tube 5 are assembled in the nozzle main body 1 . The ink recovery tube 5 is a tube for recovering the ink supplied to the nozzle body 1 to the ink cartridge using a pump when the device is stopped. The nozzle body 1 is assembled to the nozzle guard 6 and fixed to the nozzle base 15 with the nozzle body fixing screw 7 .

In addition, as can be seen from FIG. 3 , the nozzle body 1 is assembled in the order of the O-ring 8 , the hole assembly 9 , and the charging electrode block 10 , and they are fixed by the integral fixing screws 12 a to 12 d that fix the charging electrode 11 and the hole assembly.

(Structures of Charged Electrode and Charged Electrode Block in Embodiment 1)

Next, the charging electrode 11 and the charging electrode block 10 will be described mainly using FIGS. 5 and 6 . As shown in FIG. 5 and (C) of FIG. 6 , the charging electrode block 10 has a longitudinal groove 10 c formed in the center, and the charging electrode 11 is fitted (inserted) into the groove 10 c. In addition, the arrows in FIG. 5 indicate the detachment direction of the charging electrode block and the charging electrode. In this structure, an ink beam (ink particle) passes inside the charging electrode 11 inserted into the groove 10c.

As shown in FIGS. 2 to 5 and (B) of FIG. 6 , threaded grooves are formed on the flat part of the upper surface of the charging electrode 11 , and the charging wire 13 and the charging electrode 11 are fixed by the charging wire fixing screw 14 . In addition, as shown in Fig. 5 and (C) of Fig. 6, in the charging electrode 11, when the charging electrode 11 is inserted into the groove 10c of the charging electrode block 10, the outer surface of the charging electrode 11 in contact with the groove is elastically Force (spring force) pushes and fixes on the side of the groove 10c. Therefore, the charging electrode 11 in this embodiment has a bent portion 11a. The curved portion 11a serves as an electrode portion for applying a voltage to the ink particles, and the ink particles pass inside. By adopting the configuration of the curved portion 11a, the charging electrode block 10 and the charging electrode 11 are positioned with high precision. That is, the bent portion 11a (a U-shaped bent portion in the embodiment) functions in such a manner that when the charging electrode 11 is inserted into the groove 10c of the charging electrode block 10, a spring force acts, and A certain pressing force (elastic force) is applied in the width direction, thereby positioning the groove of the charging electrode in the width direction, and the charging electrode 11 and the charging electrode block 10 are in close contact with the charging electrode block 10 by the spring force and are not easy to fall off. In addition, the bent portion 11a does not need to be U-shaped. Regarding the positioning of the charging electrode block 10 and the vertical direction of the charging electrode 11, the longitudinal length of the charging electrode 11 and the depth of the groove 10c are determined in advance so that when the charging electrode 11 is inserted, the lower end of the charging electrode 11 and the bottom surface of the groove 10c The contacted position becomes the predetermined position. By adopting such a structure, the charging electrode block body 10 and the charging electrode 11 are positioned with high precision, and the charging electrode block body 10, the hole assembly 9 and the O-ring 8 are integrally fixed by screws 12a to 12d (see FIG. 3) It is fixed to the nozzle main body 1, so the position of the charging electrode 11 and the passing position of the ink particles ejected from the main body 1 is highly accurate, and will not affect the printing quality.

In this embodiment, as shown in Figures 5 and 6, threaded holes 10a, 10b are provided at both ends of the insertion port of the groove 10c of the charged electrode block 10, and threads are also formed at the corresponding positions of the hole assembly 9. The hole assemblies 9a, 9b are fixed with the nozzle main body 1 by means of integral fixing screws 12a and 12b, the charged electrode block 10, the hole assembly 9 and the O-ring 8. In addition, as shown in FIG. 3, threaded holes 9c, 9d are formed below the hole assembly 9, and the hole assembly 9, the O-ring 8, and the nozzle body 1 are integrally fixed by integral fixing screws 12c, 12d. In addition, in this embodiment, both sides of the bottom side of the groove 10c of the charging electrode block (both sides of the lower portion of the charging electrode block as shown in FIGS. 5 and 6 ) are narrowed. That is, it is formed into a shape in which members on both sides are removed (cut out). Therefore, the integrated fixing screws 12c and 12d do not fix the charged electrode block 10, but fix the hole assembly 9, the O-ring 8 and the nozzle body 1 as a whole. In addition, the charging electrode 11 in this Example 1 uses a stainless steel material in order to exert an elastic force, but the present invention is not limited thereto.

According to Figs. 2 to 4, it can be seen that in this embodiment, the positioning of the charging electrode and the charging electrode block is realized by inserting the charging electrode 11 into the groove provided in the charging electrode block, so there is no need for charging as in Patent Document 1. The electrode back cover and the charged electrode front cover can reduce the number of components. Furthermore, miniaturization of the print head (in particular, shortening of the length of the print head) can thereby be achieved.

However, details of the structures of the charging electrode 11 and the charging electrode block 10 will be described later.

(print action)

When printing, ink pressurized at a predetermined pressure is supplied from the ink supply tube 4 to the nozzle body 1 , and the ink is ejected from the ink ejection port at the center of the orifice unit 9 . At this time, a voltage is applied to the electrostrictive element 2 to vibrate the vibrator located in the nozzle body 1 , whereby the ink in the nozzle body 1 is vibrated, and the ink is granulated while flying through the space in the charged electrode block 10 . Granulated ink (ink particles) is charged by a voltage applied to the charging electrode 11 inserted and positioned in the groove 10 c of the charging electrode block 10 . After that, the flying direction of the ink is determined by the electrostatic force generated by the deflection electrode (not shown), and the ink particles are attached to the object to be printed, and printing is performed. Ink particles that are not used for printing are captured by grooves not shown in the figure, flow through the ink recovery tube 5 , and are recovered to the ink cartridges in the main body 101 by a recovery pump provided in the recovery path. In this way, in order to recover the ink particles not used for printing, it is necessary to adjust the orientation of the nozzles using the ink jet adjustment mechanism so that the ink particles (ink jets) go toward the grooves.

(Ink beam adjustment mechanism)

Next, the ink jet adjustment mechanism will be described.

In FIG. 4 , a horizontal adjustment screw 17 and a horizontal adjustment spring 18 are used to adjust the horizontal direction of the ink jet. The horizontal adjustment mechanism is configured such that the horizontal adjustment screw 17 is passed through the horizontal adjustment spring 18 and the horizontal adjustment screw 17 is inserted into the threaded hole of the nozzle base 15 . The screw head side of the horizontal adjustment screw 17 passes through a notch provided on the top of the support portion of the print head chassis 23 . By rotating the level adjustment screw 17 , the distance between the notch of the base 23 and the nozzle base 15 is adjusted while receiving the reaction force of the level adjustment spring 18 . A cylindrical boss of the base 23 exists near the ink ejection port, and this boss serves as a fulcrum of the nozzle portion. By tightening or loosening the horizontal adjustment screw 17, the horizontal direction of the ink jet can be arbitrarily determined. In addition, when adjusting the ink jet, the nozzle base fixing screws 21 and 22 are loosened, and after the adjustment is completed, the nozzle base fixing screws 21 are tightened to fix the nozzle base 15 .

Next, a method of adjusting the print head in a direction perpendicular to the surface of the chassis 23 will be described with reference to FIG. 4 .

To adjust the vertical direction of the ink jet, a vertical adjustment screw 19 and a vertical adjustment spring 20 are used. The vertical adjustment mechanism is configured by passing the vertical adjustment screw 19 through the vertical adjustment spring 20 and inserting the vertical adjustment screw 19 into the threaded hole of the nozzle base 15 . The screw head of the vertical adjustment screw 19 and the vertical adjustment spring 20 clamp the notch of the nozzle guard 6 , and the distance between the notch of the nozzle guard 6 and the nozzle base 15 is adjusted by the reaction force of the vertical adjustment spring 20 . The vertical direction of the ink jet can be arbitrarily determined by tightening or loosening the vertical adjustment screw 19 around the hollow circular boss (not shown) of the nozzle guard 6 as a fulcrum. When adjusting the ink jet, the nozzle guard fixing screw 16 is loosened, and after the adjustment is completed, the nozzle guard fixing screw is tightened to fix the nozzle base 15 .

(Detailed description of charged electrodes and charged electrode blocks)

The structures of the charging electrode 11 and the charging electrode block 10 are as described above, but these structures are the main structures in Embodiment 1 of the present invention, so they will be described in more detail using FIGS. 5 and 6 . FIG. 5 is a perspective view showing the charging electrode 11 and the charging electrode block 10 . 6 is a front view, a top view, and a left side view of FIG. 5 , (A) is a front view, (B) is a top view, and (C) is a left side view.

In FIGS. 5 and 6 , a groove 10 c is formed in the central portion of the charging electrode block 10 . In addition, in this Example 1, the charging electrode block is fixed at two places. Specifically, it is fixed on both sides (two places) of the charging electrode insertion side of the groove 10 c of the charging electrode block 10 . Therefore, screw holes 10a, 10b for passing the integral fixing screws 12a, 12b are provided. The reason for fixing on both sides of the insertion side of the charging electrode 11 is that even in the case of fixing with two integrated fixing screws, the positional relationship between the ink particle and the charging electrode in the direction of travel of the ink particle is not the same. It is possible to maintain the print quality with high precision. That is, even if the fixing force of the integral fixing screw is loosened and the charging electrode block 10 moves in the front-rear direction relative to the ejection direction of the ink particles, the movement in the front-rear direction will not affect the ejection direction of the ink particles. Influenced by variations in the distance between the inner side of the charging electrode 11 and the ink particles, the print quality can be maintained with high precision.

Furthermore, several advantages are produced by screwing the two parts on both sides. One is that the other integral fixing screws 12c, 12d do not need to fix the lower side of the charged electrode block 10 (the cut away part of the bottom of the groove 10c). Therefore, the integral fixing screws 12c and 12d only need to fix the hole assembly 9, the O-ring 8, and the nozzle main body 1, so screws shorter than those of the screws 12a and 12b can be used. In addition, if there is no need to fix the lower side of the charging electrode block 10, there is no need to provide threaded holes on the lower side of the charging electrode block 10 (both sides of the bottom of the groove 10c), so this area can be cut (removed) to make It narrows. Thereby, the exposed area of the orifice unit 9 is increased, and there is an effect that cleaning inside the print head becomes easy.

The charging electrode 11 has a curved portion 11 a for pressing both sides of the groove 10 c by its elastic force when inserted into the groove 10 c of the charging electrode block 10 . The shape of the curved portion 11a is not limited to a U-shape, and any shape may be used as long as a certain pressing force is generated during insertion and the charging electrode does not move in the vertical direction (depth direction of the groove). In addition, the material used for the charging electrode 11 does not need to be stainless steel, as long as it is an elastic material that generates a certain pressing force when inserted.

If the depth of the groove 10c of the charging electrode block 10 and the length of the charging electrode 11 in the insertion direction of the groove are set to be substantially the same size, the charging electrode 11 can be accurately charged by fully inserting the charging electrode 11 into the groove. to locate.

(Effect of Embodiment 1 of the present invention)

As described above, according to Embodiment 1 of the present invention, even with a small number of parts, the distance between the charging electrode and the ink particles can be kept constant, and the printing quality can be made high-precision. Therefore, a low-cost print head can be formed. As a result, a low-cost inkjet recording device can be realized. In addition, since the number of components in the longitudinal direction of the print head can be reduced, miniaturization can also be achieved. Furthermore, since the number of parts is small, disassembly and assembly for cleaning and inspection are also simplified, and troublesome work can be reduced.

Example 2

Next, Example 2 of the present invention will be described.

First, the print head of the second embodiment basically has the same structure as that shown in FIGS. 1 to 5 in the first embodiment. Therefore, the description of the drawings as shown in FIGS. 1 to 5 in the second embodiment is omitted, and the description thereof is also omitted. The structure of the charged electrode and the charged electrode block of the second embodiment is different from that of the first embodiment. Therefore, the description of the second embodiment will be described centering on the structures of the charging electrode 11 and the charging electrode block 10 .

(Structure of charged electrode and charged electrode block in embodiment 2)

The structures of the charged electrode and the charged electrode block in Example 2 are shown in FIG. 7 . (A) of FIG. 7 shows the state before the charging electrode 11 is inserted into the charging electrode block 10 or after it is detached from the charging electrode block 10 . (B) of FIG. 7 shows the state where the charging electrode 11 is inserted into the charging electrode block 10 .

In FIG. 7, the charging electrode block 10 is provided with a recess 10d provided on the side of the groove 10c. The concave portion 10d in this embodiment has a triangular cross-section, but the cross-sectional shape of the concave portion 10d is not limited to a triangular shape, for example, an arc shape, a trapezoidal shape, a rectangular shape, etc. are also acceptable. That is, the concave portion 10d may have any shape as long as it functions as a stopper for positioning when the charged electrode 11 is inserted into the groove 10c.

In addition, one charging electrode 11 is provided with a triangular-shaped convex portion 11b. As the shape of the convex portion 11b, a shape that fits well with the concave portion 10d is selected. When the charging electrode 11 is inserted into the groove 10c of the charging electrode block 10 and fitted into the concave portion 10d of the groove 10c, the position of the protrusion 11b becomes specified location.

That is, when assembling from the state in FIG. 7(A) to the state in FIG. The assembly positioned at the specified position can be completed. When detaching the charging electrode 11 and the charging electrode block 10 from the assembled state, it is only necessary to pull the charging electrode 11 while applying force in a direction to release them from fitting.

(Effect of Embodiment 2)

According to the second embodiment of the present invention, the same effect as the first embodiment of the present invention described above is obtained, and the assembly of the charging electrode 11 and the charging electrode block 10 and their positioning are simple.

Example 3

Next, Embodiment 3 of the present invention will be described.

First, the print head of the third embodiment basically has the same structure as that shown in FIGS. 1 to 5 in the first embodiment. Therefore, the description of the drawings shown in FIGS. 1 to 5 in the first embodiment is omitted, and the description thereof is also omitted.

The structure of the charged electrode and the charged electrode block of Example 3 is different from that of Example 1 and Example 2. Therefore, the description of the third embodiment will be described centering on the structures of the charging electrode 11 and the charging electrode block 10 . Furthermore, Embodiment 3 of the present invention is similar to the above-mentioned Embodiment 2, and therefore descriptions of parts that overlap with those of Embodiment 2 are also omitted.

(Structure of charged electrode and charged electrode block in embodiment 3)

The structures of the charged electrode and the charged electrode block in Example 3 are shown in FIG. 8 . (A) of FIG. 8 shows the state before the charging electrode 11 is inserted into the charging electrode block 10 or after it is removed from the charging electrode block 10 . (B) of FIG. 8 shows a state in which the charging electrode 11 is inserted into the charging electrode block 10 .

In FIG. 8, the charged electrode block 10 is provided with a convex portion 10e provided on the side of the groove 10c. The convex portion 10e in this embodiment has an arc-shaped cross section. The cross-sectional shape of the convex portion 10e is not limited to a circular arc shape, and may be, for example, a triangular shape, a trapezoidal shape, a rectangular shape, or the like. That is, the convex portion 10e may have any shape as long as it functions as a stopper for positioning when the charged electrode 11 is inserted into the groove 10c.

In addition, the charging electrode 11 is provided with an arc-shaped concave portion 11c. The cross-sectional shape of the recessed part 11c should just be the same fitable shape as the convex part 10e. That is, not limited to the arc shape, for example, a triangular shape, a trapezoidal shape, a rectangular shape, etc. are also no problem. When the charging electrode 11 is inserted into the groove 10 c of the charging electrode block 10 , the position of the concave portion 11 c fits into the convex portion 10 e of the charging electrode block 10 . When fitted, the charging electrode block 10 and the charging electrode 11 are at predetermined positions in the groove length direction.

That is, when assembling from the state in FIG. 8(A) to the state in FIG. The assembly of the specified positioning can be completed. When detaching the charging electrode 11 and the charging electrode block 10 from the assembled state, the charging electrode 11 may be pulled out by applying a force in a direction to release these fittings.

(Effect of Embodiment 3)

According to the third embodiment of the present invention, the same effect as that of the second embodiment of the present invention is obtained.

Example 4

Next, Embodiment 4 of the present invention will be described.

First, the print head of the fourth embodiment basically has the same structure as that shown in FIGS. 1 to 5 in the first embodiment.

Therefore, in Embodiment 4, the description of the drawings as shown in FIGS. 1 to 5 is omitted, and the description thereof is also omitted. The structure of the charging electrode and the charging electrode block of Example 4 is different from the above-mentioned Examples 1 to 3. Therefore, the description of Embodiment 4 will focus on the configurations of the charging electrode 11 and the charging electrode block 10 .

(Structure of charged electrode and charged electrode block in embodiment 4)

The structures of the charged electrode and the charged electrode block in Embodiment 4 are shown in FIG. 9 . In FIG. 9 , (A) shows the state before the charging electrode 11 is inserted into the charging electrode block 10 or after it is removed from the charging electrode block 10 . (B) of FIG. 9 shows the state where the charging electrode 11 is inserted into the charging electrode block 10 .

In FIG. 9 , the point that the charging electrode 11 is inserted into the groove 10 c of the charging electrode block 10 is the same as the above-mentioned embodiment. In this embodiment, in order to press the charging electrode 11 against the side surface of the groove 10c of the charging electrode block 10, a pressing member 11d is prepared. As the material of the pressing member 11d, a non-conductive material such as rubber can be used.

In this embodiment, after charging electrode 11 is inserted into groove 10c of charging electrode block 10, as shown in FIG. 9(B), pressing member 11d is inserted into the groove for assembly. It is the opposite process when decomposing.

(Effect of Embodiment 4)

Embodiment 4 of the present invention has the same effects as those of the above-mentioned embodiments. Furthermore, in this embodiment, the pressing member 11d is required, but the degree of freedom of selection of the material used for the charging electrode increases. That is, in the above-mentioned embodiment, the conductive elastic material is used for the charging electrode, but in the case of the fourth embodiment, the charging electrode 11 and the side surface of the groove 10C of the charging electrode block 10 are pressed by the pressing member 11d, Therefore, there is an advantage that any material can be used for the charging electrode as long as it is a conductive material (for example, aluminum).

other embodiments

The present invention is not limited to the above-described embodiments, and includes various modified examples within a range not departing from the gist of the present invention. The above-mentioned embodiments have been described in detail to explain the present invention in an easy-to-understand manner, and are not necessarily limited to include all the described structures. In addition, a part of the structure of a certain example can be replaced with the structure of another example, and the structure of another example can also be added to the structure of a certain example. Addition, deletion, and substitution of other configurations are also possible for the configurations of the respective embodiments.

Explanation of reference signs

1...Nozzle body

2...Electrostrictive element

3...counterweight

4...Ink supply tube

5...Ink recovery tube

6...Nozzle guard

7...Nozzle body fixing screw

8...O-ring

9...hole components

9a～9d...Threaded hole

10......Electric electrode block

10a, 10b...Threaded holes

10c... Slot

10d...Concave

10e...Convex part

11...Electric electrodes

11a...Curved part

11b...Convex part

11c...Concave

11d...Press parts

12a～12d...Integrated fixing screws

13...Live wiring

14...Live wiring fixing screw

15...Nozzle base

16a～16c...Nozzle cover fixing screw

17...Horizontal adjustment screw

18...Horizontal adjustment spring

19...Vertical adjustment screw

20...Vertical adjustment spring

21...Nozzle base fixing screw

22...Nozzle base fixing screw

23...base

100...Inkjet recording device

101...subject

102...cable

103......Print head

104...Control Department.

Claims (8)

1. An inkjet recording device comprising a main body for supplying ink and a printing head that receives the supply of the ink and prints, the inkjet recording device is characterized in that: The printhead includes: a nozzle that ejects ink; an orifice assembly through which granulated ink particles ejected from the nozzle pass; and a charging electrode that charges the ink particles passing through the orifice assembly, The inkjet recording device includes a block-shaped charging electrode block having a groove in a central portion thereof, In a state where the charging electrode is inserted into the groove of the charging electrode block, the side surface of the groove and the charging electrode are pressed by elastic force, The charged electrode block, the orifice assembly and the nozzle are integrally formed. 2. The inkjet recording device according to claim 1, wherein: Threaded holes are provided on both sides of the groove of the charged electrode block, through which two integrated screws are used to integrate the charged electrode block, the hole assembly and the nozzle. 3. The inkjet recording device according to claim 2, characterized in that: Portions on both sides of the bottom of the tank of the charged electrode block were removed. 4. The inkjet recording device according to claim 1, characterized in that: The charged electrode is provided with a bent portion, and the bent portion generates the elastic force during the insertion. 5. The inkjet recording device according to claim 1, wherein: A recess is provided on the side of the groove of the charged electrode block, The charging electrode is provided with a convex portion on the side contacting with the concave portion, When the charging electrode is inserted into the groove of the charging electrode block, the protrusion fits into the recess. 6. The inkjet recording device according to claim 1, wherein: A protrusion is provided on the side of the groove of the charged electrode block, A concave portion is provided on a side surface of the charging electrode in contact with the convex portion, When the charging electrode is inserted into the groove of the charging electrode block, the concave portion fits into the convex portion. 7. The inkjet recording device according to claim 1, wherein: A non-conductive pressing member is prepared, and after inserting the charging electrode into the groove, the pressing member is inserted into the groove. 8. An inkjet recording device comprising a main body that supplies ink and a print head that receives the supply of ink and prints, the ink recording device being characterized in that: The printhead includes: a nozzle that ejects ink; an orifice assembly through which granulated ink particles ejected from the nozzle pass; and a charging electrode that charges the ink particles passing through the orifice assembly, The inkjet recording device includes a block-shaped charging electrode block having a groove in a central portion thereof, The charging electrode is configured to have an elastic force that expands the width of the electrode portion of the charging electrode in the width direction of the groove, When the end of the charging electrode is inserted into the groove of the charging electrode block, the width of the charging electrode is a certain value, The charged electrode block, the orifice assembly and the nozzle are integrally formed.

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