WO2021111657A1

WO2021111657A1 - Inkjet recording device

Info

Publication number: WO2021111657A1
Application number: PCT/JP2020/019775
Authority: WO
Inventors: 翔貴山口; 彬前田; 優介岡本
Original assignee: 株式会社日立産機システム
Priority date: 2019-12-06
Filing date: 2020-05-19
Publication date: 2021-06-10
Also published as: JP7316376B2; CN114728521A; CN114728521B; JPWO2021111657A1

Abstract

Provided is an inkjet recording device having a printing head that provides high-precision positioning of charged electrodes and has fewer components.　This inkjet recording device comprises a main body that supplies ink and a printing head that receives supply of the ink and prints. The printing head comprises: a nozzle that jets ink; an orifice through which ink particles that have been jetted from the nozzle and formed into particles pass; and a charged electrode that charges the ink particles that have passed through the orifice. A charged electrode block has a configuration that has, in a center section thereof, a groove for inserting the charged electrode. The charged electrode comprises an elastic body and has a bent section provided on an end thereof. The charged electrode is inserted into the groove in the charged electrode block and the charged electrode block, the orifice, and the nozzle are integrated using an integrated fixing screw.

Description

Inkjet recording device

The present invention relates to an inkjet recording device.

In an inkjet recording device used for industrial purposes, ink is supplied to a nozzle in a print head by a pump in the main body, ink is ejected from an orifice at the tip of the nozzle, and ink (ink particles) that has become particles during flight is charged. Therefore, the ink is deflected according to the amount of charge to fly and print. Ink not used for printing is collected and collected in the main body by a pump. The ink particles are charged by applying a voltage to a charging electrode provided during the passage of the ink particles ejected from the nozzle. In this case, since the diameter of the ink particles that are atomized and fly is about 0.1 mm, high accuracy is required for the shape and arrangement position of the charged electrodes.

As a print head of an inkjet recording device that positions the position of such a charged electrode with high accuracy, for example, a technique disclosed in Japanese Patent Application Laid-Open No. 2017-132165 (Patent Document 1) is known. The print head in Patent Document 1 has a charged electrode block to which a charged electrode is fixed, a charged electrode back cover between the charged electrode block and the orifice, and a side opposite to the charged electrode back cover with respect to the charged electrode block. A charged electrode front cover for fixing the charged electrode block is provided, and the charged electrode block, the charged electrode back cover, and the charged electrode front cover are integrally formed, and the charged electrode, the orifice, and the nozzle are integrated. It is configured as. That is, in the charged electrode block having the charged electrode, the charged electrode is integrally formed by the charged electrode back cover and the charged electrode front cover provided before and after the charged electrode block, and the mounting position accuracy of the charged electrode is improved. It realizes an inkjet recording device with stable print quality.

Japanese Unexamined Patent Publication No. 2017-132165

According to the technique of Patent Document 1 described above, the positioning of the charged electrode can be made highly accurate, and high quality printing can be realized.
However, in this technique, a charged electrode block, a charged electrode back cover, and the charged electrode front cover are required for highly accurate positioning of the charged electrode. Therefore, there is a problem that the number of parts increases and the cost increases. In addition, due to the large number of parts, when disassembling and cleaning and inspecting the print head, it takes time and effort to remove the print head (disassembly) and to reassemble the print head after cleaning and inspection. There is annoyance.

Therefore, an object of the present invention is to provide an inkjet recording apparatus having a print head with a reduced number of parts while realizing highly accurate positioning of the charged electrode.

In order to achieve the above-mentioned object, the present invention is, for example, an inkjet recording apparatus including a main body for supplying ink and a printing head for printing by receiving the supply of the ink. The head includes a nozzle for ejecting ink, an orifice through which the atomized ink particles ejected by the nozzle pass, and a charging electrode for charging the ink particles passing through the orifice, and has a groove in the center. The charging electrode block is provided with a block-shaped charging electrode block having a structure in which the side surface of the charging electrode and the charging electrode are pressed by an elastic force in a state where the charging electrode is inserted into the groove of the charging electrode block. It is an inkjet recording apparatus that integrally constitutes the orifice and the nozzle.
Other configurations relating to the present invention will become clear from the description of Examples described later.

According to the present invention, it is possible to provide an inkjet recording apparatus having a print head with a reduced number of parts while realizing highly accurate positioning of the charged electrode.

It is an overall external view of the inkjet recording apparatus in Example 1 of this invention. It is a perspective view which shows the print head in Example 1 of this invention. It is an exploded perspective view of the print head in Example 1 of this invention. It is a figure which shows the front view, the top view, and the side view of the print head of FIG. It is a perspective view of the charged electrode and the charged electrode block in Example 1 of this invention. It is a figure which shows the front view, the top view, and the left side view of the charge electrode and the charge electrode block shown in FIG. It is a figure which shows the charged electrode and the charged electrode block in Example 2 of this invention. It is a figure which shows the charged electrode and the charged electrode block in Example 3 of this invention. It is a figure which shows the charged electrode and the charged electrode block in Example 4 of this invention.

Hereinafter, specific examples of the present invention will be described with reference to the drawings. The present invention is not limited to the examples described below. Further, in each of the following figures, the same device may be assigned the same number (reference numeral), and the description of the device already described may be omitted.

Example 1 of the present invention will be described with reference to FIGS. 1 to 6. Here, FIG. 1 is an overall external view of the inkjet recording apparatus, FIG. 2 is a view showing a print head according to the first embodiment of the present invention, FIG. 3 is an exploded view of the print head, and FIG. 4 is a front view / top surface of the print head. FIG. 5 is a left side view, FIG. 5 is a block diagram of a charged electrode and a charged electrode in the first embodiment, and FIG. 6 is a front view, a top view, and a left side view of FIG.

(Overall configuration of inkjet recording device)
First, the overall configuration of the inkjet recording apparatus will be described with reference to FIG.
In FIG. 1, the inkjet recording device 100 includes a main body 101, a cable 102, a print head 103, and a control unit 104. Inside the main body 101, 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 collecting unused ink, and a solenoid valve provided in the middle of the recovery path. And a pump etc. are provided. The ink is supplied to the print head 103 via a path in the cable 102. In the print head 103, the supplied ink is made into ink particles by a nozzle and ejected, and the ink particles are charged with a voltage corresponding to the characters to be printed by the charging electrode. Then, the deflection electrode gives a deflection corresponding to the amount of charge and flies to the printed matter to perform printing. The ink not used for printing is captured (collected) by the gutter and collected in the ink container in the main body 101 from the print head 103 via the path in the cable 102. The control unit 104 includes a power supply, a board, and an operation panel. The control unit 104 performs general control such as supplying power required for printing by the inkjet recording device, transmitting various signals necessary for printing by the inkjet recording device, and receiving signals from a sensor or the like outside the control unit.

Since the main point of the present invention is a component of the print head 103 of the inkjet recording apparatus 100, the first embodiment of the present invention will be described below focusing on the configuration and arrangement of the print head 103.

(Configuration and arrangement of print heads)
Next, the configuration and arrangement of the print head according to the first embodiment of the present invention will be described with reference to FIGS. 2 to 5. As described above, FIG. 2 is a perspective view of the print head. FIG. 3 is an exploded perspective view of a main part of the print head. 4A and 4B show a front view, a top surface portion, and a left side view of the print head shown in FIG. 2, where FIG. 4A is a front view of the printhead, FIG. 4B is a top view, and FIG. 4C is a left side view. It is a figure which shows. In FIG. 4, the description of the nozzle jacket 6 in FIG. 2 is omitted. FIG. 5 is a perspective view of the charged electrode and the charged electrode block.

In FIG. 2, a nozzle body 1 as shown in FIGS. 3 and 4 is installed in the nozzle jacket 6. The nozzle body 1 may be simply referred to as a "nozzle". The ink particles ejected from the nozzle body 1 pass through the inner side of the charged electrode 11. By applying a voltage to the charging electrode 11 with respect to the passing ink particles, each ink particle is charged according to the applied voltage. In the first embodiment, the charging electrode 11 is inserted into the groove 10c of the charging electrode block 10 as shown in FIG. Further, as shown in FIG. 3, the charged electrode block 10, the orifice 9, and the O-ring 8 are fixed to the nozzle body 1 by the integrated fixing screws 12a to 12d. The nozzle jacket 6 is fixed by the nozzle jacket fixing screws 16a to 16c. Further, these constituent devices are fixed to the base 23 by the nozzle base fixing screw 21. The leveling screw 17 and the leveling spring 18 are provided for horizontal adjustment of the ink beam. The vertical adjusting screw 19 and the vertical adjusting spring 20 (not shown in FIG. 2, see FIG. 4) are provided for vertical adjustment of the ink beam.

As shown in FIG. 3, the nozzle body 1 incorporates an electric distortion element 2, a counterweight 3, an ink supply tube 4, and an ink recovery tube 5. The ink recovery tube 5 is a tube for collecting the ink supplied to the nozzle body 1 to the ink tank by a pump when the device is stopped. The nozzle body 1 is incorporated into the nozzle jacket 6 and fixed to the nozzle base 15 with the nozzle body fixing screw 7.
Further, as can be seen from FIG. 3, the nozzle body 1 is assembled in the order of the O-ring 8, the orifice 9, and the charging electrode block 10, and these are fixed by using the integrated fixing screws 12a to 12d for fixing the charging electrode 11 and the orifice. To do.

(Structure of Charged Electrode and Charged Electrode Block in Example 1)
Next, the charging electrode 11 and the charging electrode block 10 will be described mainly with reference to FIGS. 5 and 6. As shown in FIGS. 5 and 6 (C), the charged electrode block 10 has a vertical groove 10c formed in the central portion, and the charged electrode 11 is inserted (inserted) into the groove 10c. Configure. The arrow in FIG. 5 indicates the attachment / detachment direction of the charging electrode block and the charging electrode. In this configuration, the ink beam (ink particles) passes through the inside of the charged electrode 11 inserted into the groove 10c.

As shown in FIGS. 2 to 5 and 6 (B), the charging electrode 11 has a thread groove formed on a flat portion on the upper surface, and the charging wiring 13 and the charging electrode 11 are fixed by a charging wiring fixing screw 14. Will be done. Further, as shown in FIGS. 5 and 6 (C), when the charged electrode 11 is inserted into the groove 10c of the charged electrode block 10, the outer surface of the charged electrode 11 is in contact with the groove of the charged electrode 11. It is pressed and fixed to the side surface of the groove 10c by an elastic force (spring force). Therefore, the charged electrode 11 in this embodiment has a bent portion 11a. The bent portion 11a is an electrode portion for applying a voltage to the ink particles, and the ink particles pass through the inside thereof. Due to the configuration of the bent portion 11a, the charging electrode block 10 and the charging electrode 11 are positioned with high accuracy. That is, when the bent portion 11a (U-shaped bent portion in the embodiment) inserts the charged electrode 11 into the groove 10c of the charged electrode block 10, a spring force acts and a constant pressing force (constant pressing force in the width direction of the groove) ( By applying the elastic force), the groove of the charged electrode is positioned in the width direction, and the charged electrode 11 and the charged electrode block 10 are brought into close contact with each other by the spring force so as not to easily come off. The bent portion 11a does not have to be U-shaped. The vertical positioning of the charging electrode block 10 and the charging electrode 11 is such that when the charging electrode 11 is inserted, the lower end of the charging electrode 11 comes into contact with the bottom surface of the groove 10c at a predetermined position. Determine the length in the vertical direction and the depth of the groove 10c. With such a configuration, the charged electrode block 10 and the charged electrode 11 are positioned with high accuracy, and the charged electrode block 10, the orifice 9, and the O-ring 8 are integrally fixed to the nozzle body 1. Since it is fixed by the screws 12a to 12d (see FIG. 3), the positional relationship between the charging electrode 11 and the passing position of the ink particles ejected from the main body 1 becomes highly accurate and does not affect the print quality.

In this embodiment, as shown in FIGS. 5 and 6, screw

holes

10a and 10b are provided at both ends of the insertion port of the groove 10c of the charged electrode block 10 at positions corresponding to the orifice 9. Screw holes 9a and 9b are formed, and the charged electrode block 10, the orifice 9, and the O-ring 8 are fixed to the nozzle body 1 by the integrated fixing screws 12a and 12b. Further, as shown in FIG. 3, screw holes 9c and 9d are formed below the orifice 9, and the orifice 9, the O-ring 8 and the nozzle body 1 are integrated by the integrated fixing screws 12c and 12d. Is fixed to. Further, in this embodiment, both sides of the groove 10c of the charged electrode block on the bottom side (both sides of the lower portion of the charged electrode block as shown in FIGS. 5 and 6) are narrowed. That is, the shape is such that the members on both sides are removed (scraped off). Therefore, the integrated fixing screws 12c and 12d do not fix the charged electrode block 10, but integrally fix the orifice 9, the O-ring 8, and the nozzle body 1. The charged electrode 11 in the first embodiment uses a stainless steel material in order to exert an elastic force, but the present invention is not limited to this.

As can be seen from FIGS. 2 to 4, in this embodiment, positioning of the charged electrode and the charged electrode block is realized by inserting the charged electrode 11 into the groove provided in the charged electrode block, as in Patent Document 1. The charged electrode back cover and the charged electrode front cover are not required, and the number of parts can be reduced. In addition, this makes it possible to reduce the size of the print head (particularly, shorten the length of the print head).
A detailed description of the structures of the charged electrode 11 and the charged electrode block 10 will be described later.

(Print operation)
When printing, ink pressurized at a predetermined pressure is supplied from the ink supply tube 4 to the nozzle body 1, and ink is ejected from the ink ejection port at the center of the orifice 9. At this time, by applying a voltage to the electrolytic distortion element 2 to vibrate the vibrator in the nozzle body 1, the ink in the nozzle body 1 is vibrated, and the ink particles while flying in the space in the charged electrode block 10. To become. The particleized ink (ink particles) is charged by the voltage applied to the charged electrode 11 inserted and positioned in the groove 10c of the charged electrode block 10. After that, the flight direction of the ink is determined by the electrostatic force generated by the deflection electrode (not shown), and the ink particles adhere to the object to be printed to perform printing. The ink particles not used for printing are captured by a gutter (not shown), pass through the ink collection tube 5, and are collected in the ink tank in the main body 101 by a collection pump installed in the collection path. In this way, in order to collect the ink particles that have not been used for printing, it is necessary to adjust the direction of the nozzle by the beam adjusting mechanism so that the ink particles (ink beam) are directed toward the gutter.

(Ink beam adjustment mechanism)
Next, the ink beam adjusting mechanism will be described.
In FIG. 4, a horizontal adjustment screw 17 and a horizontal adjustment spring 18 are used for adjusting the ink beam in the horizontal direction. The horizontal adjustment mechanism has a configuration in which the horizontal adjustment screw 17 is passed through the horizontal adjustment spring 18 and the horizontal adjustment screw 17 is inserted into the screw hole of the nozzle base 15. The screw head side of the leveling screw 17 passes through a notch at the top of the support portion provided on the base 23 of the print head. By rotating the horizontal adjustment screw 17, the distance between the notch portion of the base 23 and the nozzle base 15 is adjusted while receiving the reaction force of the horizontal adjustment spring 18. A columnar boss of the base 23 exists near the ink ejection port, and the boss serves as a fulcrum of the nozzle portion, and the horizontal direction of the ink beam can be arbitrarily determined by tightening or loosening the leveling screw 17. Is possible. When adjusting the ink beam, the nozzle base fixing screws 21 and 22 are loosened, and after the adjustment is completed, the nozzle base fixing screw 21 is tightened to fix the nozzle base 15.

Next, a method of adjusting the print head in the direction perpendicular to the surface of the base 23 will be described with reference to FIG.
A vertical adjustment screw 19 and a vertical adjustment spring 20 are used to adjust the ink beam in the vertical direction. The vertical adjustment mechanism has a configuration in which the vertical adjustment screw 19 is passed through the vertical adjustment spring 20 and the vertical adjustment screw 19 is inserted into the screw hole of the nozzle base 15. The notch portion of the nozzle jacket 6 is sandwiched between the screw head of the vertical adjustment screw 19 and the vertical adjustment spring 20, and the distance between the notch portion of the nozzle jacket 6 and the nozzle base 15 is adjusted by the reaction force of the vertical adjustment spring 20. The vertical direction of the ink beam can be arbitrarily determined by tightening or loosening the vertical adjustment screw 19 with the hollow circular boss (not shown) of the nozzle jacket 6 as a fulcrum. When adjusting the ink beam, the nozzle jacket fixing screw 16 is loosened, and after the adjustment is completed, the nozzle jacket fixing screw is tightened to fix the nozzle base 15.

(Detailed description of the charged electrode and the charged electrode block)
The configurations of the charged electrode 11 and the charged electrode block 10 are as described above, but since these configurations are the configurations of the main parts in the first embodiment of the present invention, they will be described in more detail with reference to FIGS. 5 and 6. .. FIG. 5 is a perspective view showing the charged electrode 11 and the charged electrode block 10. 6A and 6B are a front view, a top view, and a left side view of FIG. 5, in which FIG. 6A is a front view, FIG. 6B is a top view, and FIG. 6C is a left side view.

In FIGS. 5 and 6, a groove 10c is formed in the central portion of the charged electrode block 10. Further, in the first embodiment, the charged electrode block is fixed at two places. Specifically, it is fixed on both sides (two places) of the groove 10c of the charging electrode block 10 on the charging electrode insertion side. Therefore, screw

holes

10a and 10b are provided for penetrating the integrated fixing screws 12a and 12b. The reason for fixing on both sides of the insertion side of the charging electrode 11 is that the positional relationship between the ink particles and the charging electrode in the traveling direction of the ink particles does not change even when fixed by the two integrated fixing screws, and the print quality This is so that the accuracy can be maintained. That is, even if the fixing force of the integrated fixing screw is loosened and the charging electrode block 10 moves in the front-rear direction with respect to the ejection direction of the ink particles, the movement in the front-rear direction is inside the charging electrode 11 in the ejection direction of the ink particles. Since it does not affect the fluctuation of the distance between the ink particles and the ink particles, the print quality can be maintained with high accuracy.

Furthermore, there are some merits by fixing the screws at two places on both sides. One is that the other integrated fixing screws 12c and 12d do not need to fix the lower side of the charged electrode block 10 (the portion where the bottom of the groove 10c is scraped off). Therefore, the integrated fixing screws 12c and 12d need only fix the orifice 9, the O-ring 8, and the nozzle body 1, so that screws shorter than 12a and 12b can be used. Further, if it is no longer necessary to fix the lower side of the charged electrode block 10, it is not necessary to provide screw holes on the lower side ((both sides of the bottom of the groove 10c)) of the charged electrode block 10, so that region is deleted (removed). And can be thinned. As a result, the exposed area of the orifice 9 is increased, which has the effect of facilitating cleaning of the inside of the print head.

The charged electrode 11 has a bent portion 11a in order to press both sides of the groove 10c with its elastic force when it is inserted into the groove 10c of the charged electrode block 10. The shape of the bent portion 11a is not limited to the U shape, and any shape can be used as long as it generates a constant pressing force at the time of insertion and does not move in the vertical direction (groove depth direction) of the charged electrode. good. Further, the material used for the charging electrode 11 does not have to be stainless steel, and may be an elastic material that generates a constant pressing force at the time of insertion.

If the depth of the groove 10c of the charged electrode block 10 and the length of the charged electrode 11 in the insertion direction into the groove are set to substantially the same dimensions, the charged electrode 11 is completely inserted into the groove, so that the charged electrode 11 is highly accurate. Can be positioned to.

(Effect of Example 1 of the present invention)
As described above, according to the first embodiment of the present invention, the distance between the charged electrode and the ink particles can be kept constant even with a small number of parts, and the print quality can be made highly accurate. Therefore, a low-cost print head can be used. As a result, a low-cost inkjet recording device can be realized. Further, since the number of parts in the length direction of the print head can be reduced, miniaturization can be realized. Further, since the number of parts is small, disassembly and assembly for cleaning and inspection can be easily performed, and the troublesome work can be reduced.

Next, Example 2 of the present invention will be described.
First, the print head of the second embodiment has basically the same configuration as that of 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 will be omitted, and the description thereof will also be omitted. In the second embodiment, the configurations of the charged electrode and the charged electrode block are different from those in the first embodiment. Therefore, the description of the second embodiment will mainly explain the configuration of the charged electrode 11 and the charged electrode block 10.

(Structure of Charged Electrode and Charged Electrode Block in Example 2)
The configuration of the charged electrode and the charged electrode block in Example 2 is shown in FIG. FIG. 7A shows a state before the charging electrode 11 is inserted into the charging electrode block 10 or after the charging electrode 11 is removed. FIG. 7B shows a state in which the charged electrode 11 is inserted into the charged electrode block 10.

In FIG. 7, the charged electrode block 10 is provided with a recess 10d provided on the side surface of the groove 10c. Although the recess 10d in this embodiment has a triangular cross section, the cross-sectional shape of the recess 10d is not limited to a triangular shape, and there is no problem with, for example, an arc shape, a trapezoidal shape, or a rectangular shape. That is, the recess 10d may have any shape as long as it functions as a stopper for positioning the charged electrode 11 when it is inserted into the groove 10c.

Further, one of the charged electrodes 11 is provided with a triangular convex portion 11b. As the shape of the convex portion 11b, a shape that fits well with the concave portion 10d is selected. The position of the convex portion 11b is determined in the groove length direction of the charged electrode block 10 and the charged electrode 11 when the charged electrode 11 is inserted into the groove 10c of the charged electrode block 10 and is aligned with the concave portion 10d of the groove 10c. It is set to the position of.

That is, when assembling from the state (A) of FIG. 7 to the state of (B) of FIG. 7, the position where the convex portion 11b of the charging electrode 11 fits into the concave portion 10d of the charging electrode block 10 Just insert it up to complete the assembly positioned in place. When removing the charged electrode 11 and the charged electrode block 10 from the assembled state, it is sufficient to pull out the charged electrode 11 while applying a force in the direction in which the combination thereof is released.

(Effect of Example 2)
According to the second embodiment of the present invention, the same effect as that of the first embodiment of the present invention described above is obtained, and the effect that the charging electrode 11 and the charging electrode block 10 are easily assembled and their positioning is easy. Have.

Next, Example 3 of the present invention will be described.
First, the print head of the third embodiment has basically the same configuration as that of FIGS. 1 to 5 in the first embodiment. Therefore, the description of the drawings as shown in FIGS. 1 to 5 in the first embodiment will be omitted, and the description thereof will also be omitted.
In Example 3, the configurations of the charged electrode and the charged electrode block are different from those of Example 1 and Example 2. Therefore, the description of the third embodiment will mainly explain the configuration of the charged electrode 11 and the charged electrode block 10. Further, since Example 3 of the present invention is similar to Example 2 described above, the description of the part overlapping with the description of Example 2 will be omitted.

(Structure of Charged Electrode and Charged Electrode Block in Example 3)
The configuration of the charged electrode and the charged electrode block in Example 3 is shown in FIG. FIG. 8A shows a state before the charging electrode 11 is inserted into the charging electrode block 10 or after the charging electrode 11 is removed. FIG. 8B shows a state in which the charged electrode 11 is inserted into the charged electrode block 10.

In FIG. 8, the charged electrode block 10 is provided with a convex portion 10e provided on the side surface 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 the arc shape, and there is no problem even if it has 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 has a function as a stopper for positioning when the charged electrode 11 is inserted into the groove 10c.

Further, the charging electrode 11 is provided with an arc-shaped recess 11c. The cross-sectional shape of the concave portion 11c may be a shape that can be combined with the convex portion 10e. That is, there is no problem not only in the arc shape but also in a triangular shape, a trapezoidal shape, a rectangular shape and the like. The position of the recess 11c is aligned with the convex portion 10e of the charging electrode block 10 when the charging electrode 11 is inserted into the groove 10c of the charging electrode block 10. When they are combined, they are set to a predetermined position in the groove length direction of the charged electrode block 10 and the charged electrode 11.

That is, when assembling from the state of (A) of FIG. 8 to the state of (B) of FIG. 8, the position where the concave portion 11c of the charging electrode 11 is aligned with the convex portion 10e of the charging electrode block 10 Assembling with the predetermined positioning is completed only by inserting up to. When removing the charged electrode 11 and the charged electrode block 10 from the assembled state, it is sufficient to pull out the charged electrode 11 by applying a force in the direction in which the combination thereof is released.

(Effect of Example 3)
According to Example 3 of the present invention, it has the same effect as that of Example 2 of the present invention.

Next, Example 4 of the present invention will be described.
First, the print head of the fourth embodiment has basically the same configuration as that of FIGS. 1 to 5 in the first embodiment.
Therefore, in the fourth embodiment, the description of the drawings as shown in FIGS. 1 to 5 is omitted, and the description thereof is also omitted. In Example 4, the configurations of the charged electrode and the charged electrode block are different from those of Examples 1 to 3 described above. Therefore, the description of the fourth embodiment will mainly explain the configuration of the charged electrode 11 and the charged electrode block 10.

(Structure of Charged Electrode and Charged Electrode Block in Example 4)
The configuration of the charged electrode and the charged electrode block in Example 4 is shown in FIG. In FIG. 9, (A) shows a state before inserting the charging electrode 11 into the charging electrode block 10 or after removing the charging electrode 11. FIG. 9B shows a state in which the charged electrode 11 is inserted into the charged electrode block 10.

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

In this embodiment, after the charging electrode 11 is inserted into the groove 10c of the charging electrode block 10, the pressing member 11d is inserted into the groove and assembled as shown in FIG. 9B. When disassembling, the procedure is reversed.

(Effect of Example 4)
Example 4 of the present invention has the same effect as each of the above-mentioned examples. Further, in this embodiment, although the pressing member 11d is required, the degree of freedom in selecting the material used for the charging electrode is increased. That is, in the above-described embodiment, a conductive elastic material is used for the charged electrode, but in the case of the fourth embodiment, the charged electrode 11 and the side surface of the groove 10C of the charged electrode block 10 are pressed by the pressing member 11d. Since the structure is used, the charged electrode has an advantage that any conductive material (for example, aluminum) can be used.

Other examples

The present invention is not limited to the above-described embodiment, and includes various modifications within a range that does not deviate from the gist of the present invention. The above-mentioned examples have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the described configurations. Further, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. It is also possible to add, delete, or replace other configurations with respect to the configurations of each embodiment.

1 ... Nozzle body, 2 ... Electrostatic distortion element, 3 ... Counter weight, 4 ... Ink supply tube, 5 ... Ink recovery tube, 6 ... Nozzle jacket, 7 ... Nozzle body fixing screw, 8 ... O ring, 9 ... orifice, 9a ~ 9d ... screw hole, 10 ... charged electrode block, 10a, 10b ... screw hole, 10c ... groove, 10d ... concave, 10e ... convex, 11 ... charged electrode, 11a ... bent, 11b ... convex, 11c ... concave , 11d ... Pressing member, 12a-12d ... Integrated fixing screw, 13 ... Charged wiring, 14 ... Charged wiring fixing screw, 15 ... Nozzle base, 16a-16c ... Nozzle jacket 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 ... Main body, 102 ... Cable, 103 ... Printing Head, 104 ... Control unit

Claims

An inkjet recording device including a main body that supplies ink and a print head that receives the supply of ink for printing.
The print head includes a nozzle for ejecting ink, an orifice through which the particleized ink particles ejected by the nozzle pass, and a charging electrode for charging the ink particles passing through the orifice.
A block-shaped charged electrode block with a groove in the center is provided.
With the charging electrode inserted in the groove of the charging electrode block, the side surface of the groove and the charging electrode are pressed by an elastic force.
An inkjet recording device that integrally comprises the charged electrode block, the orifice, and the nozzle.
In the inkjet recording apparatus according to claim 1,
It is characterized in that screw holes are provided on both sides of the groove of the charged electrode block, and the charged electrode block, the orifice, and the nozzle are integrated using two integrated screws through the screw holes. Inkjet recording device.
In the inkjet recording apparatus according to claim 2,
An inkjet recording apparatus characterized in that members on both sides of the bottom of the groove of the charged electrode block are removed.
In the inkjet recording apparatus according to claim 1,
An inkjet recording apparatus characterized in that a bent portion is provided on the charged electrode so that the bent portion generates the elastic force when the charged electrode is inserted.
In the inkjet recording apparatus according to claim 1,
A recess is provided on the side surface of the groove of the charged electrode block.
The charged electrode is provided with a convex portion on the side surface in contact with the concave portion.
An inkjet recording apparatus characterized in that when the charging electrode is inserted into the groove of the charging electrode block, the convex portion and the concave portion are aligned with each other.
In the inkjet recording apparatus according to claim 1,
A convex portion is provided on the side surface of the groove of the charged electrode block.
A concave portion is provided on the side surface of the charging electrode in contact with the convex portion.
An inkjet recording apparatus characterized in that when the charging electrode is inserted into the groove of the charging electrode block, the concave portion and the convex portion are aligned with each other.
In the inkjet recording apparatus according to claim 1,
An inkjet recording device characterized as 4.
An inkjet recording device including a main body that supplies ink and a print head that receives the supply of ink for printing.
The print head includes a nozzle for ejecting ink, an orifice through which the particleized ink particles ejected by the nozzle pass, and a charging electrode for charging the ink particles passing through the orifice.
A block-shaped charged electrode block with a groove in the center is provided.
The charged electric force has an elastic force so that the width of the electrode portion of the charged electrode expands in the width direction of the groove.
When the end portion of the charged electrode is inserted into the groove of the charged electrode, the width of the charged electrode is made constant.
An inkjet recording device that integrally comprises the charged electrode block, the orifice, and the nozzle.