CN114728521A - Ink jet recording apparatus - Google Patents
Ink jet recording apparatus Download PDFInfo
- Publication number
- CN114728521A CN114728521A CN202080074903.8A CN202080074903A CN114728521A CN 114728521 A CN114728521 A CN 114728521A CN 202080074903 A CN202080074903 A CN 202080074903A CN 114728521 A CN114728521 A CN 114728521A
- Authority
- CN
- China
- Prior art keywords
- ink
- charging electrode
- charged electrode
- charging
- electrode block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/07—Ink jet characterised by jet control
- B41J2/075—Ink jet characterised by jet control for many-valued deflection
- B41J2/08—Ink jet characterised by jet control for many-valued deflection charge-control type
- B41J2/085—Charge means, e.g. electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Abstract
The invention provides an ink jet recording apparatus having a print head which realizes high-precision positioning of a charged electrode and reduces the number of components. An ink jet recording apparatus includes a main body to which ink is supplied and a print head to receive the supply of the ink and perform printing. The print head includes: a nozzle that ejects ink; an orifice assembly through which the ink particles ejected from the nozzle and granulated pass; and a charging electrode for charging the ink particles passed through the orifice member. The charging electrode block has a groove for inserting the charging electrode in the center portion. The charged electrode is made of an elastic body, and a bent portion is provided at an end portion thereof. The charged electrode is inserted into the groove of the charged electrode block, and the charged electrode block, the orifice assembly, and the nozzle are integrated by an integrated fixing screw.
Description
Technical Field
The present invention relates to an inkjet recording apparatus.
Background
An industrial inkjet recording apparatus supplies ink to nozzles in a print head by a pump in a main body, ejects the ink from a hole at the tip of the nozzle, charges the pelletized ink (ink pellets) during flight, and performs printing by deflecting the ink while flying according to the amount of charge. Ink that is not used for printing is collected and recovered into the main body using a pump. The ink particles are charged by applying a voltage to a charging electrode provided in the middle of the passage of the ink particles ejected from the nozzle. In this case, since the diameter of the ink particles that are granulated and fly is about 0.1mm, the shape and the arrangement position of the charged electrode need to be highly precise.
As a print head of an ink jet recording apparatus for positioning the position of the 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 this patent document 1 includes: a charged electrode block to which a charged electrode is fixed; a charged electrode back cover between the charged electrode block and the hole; and a charging electrode front cover which is arranged on the opposite side of the charging electrode back cover relative to the charging electrode block and fixes the charging electrode block, wherein the charging electrode block, the charging electrode back cover and the charging electrode front cover are integrated, and the charging electrode and the hole are integrated with the nozzle. That is, the charged electrode block having the charged electrode is configured such that the charged electrode is integrally formed by the charged electrode back cover and the charged electrode front cover provided in front and rear of the charged electrode block, and the mounting position accuracy of the charged electrode is improved, thereby realizing the ink jet recording apparatus having stable printing quality.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2017-132165
Disclosure of Invention
Problems to be solved by the invention
According to the technique of patent document 1, the positioning of the charging electrode can be performed with high accuracy, and high-quality printing can be achieved.
However, in this technique, in order to perform highly accurate positioning of the charging electrode, a charging electrode block, a charging electrode back cover, and the charging electrode front cover are required. Therefore, the number of parts increases, which leads to a problem of high cost. Further, since the number of parts is large, there is a problem that it takes time to disassemble (disassemble) the print head when disassembling, cleaning, and inspecting the print head, and to assemble the print head again after cleaning and inspecting.
Accordingly, an object of the present invention is to provide an ink jet recording apparatus having a print head which realizes highly accurate positioning of a charged electrode and which has a reduced number of components.
Means for solving the problems
In order to achieve the above object, one example of the present invention is an ink jet recording apparatus including a main body to which ink is supplied and a print head that receives the supply of the ink and performs printing, the print head including: a nozzle that ejects ink; an orifice assembly through which the granulated ink particles ejected from the nozzle pass; and a charging electrode for charging the ink particles passed through the orifice assembly, wherein the ink jet recording apparatus includes a block-shaped charging electrode block having a groove in a central portion thereof, and wherein a side surface of the groove 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, and wherein the charging electrode block, the orifice assembly, and the nozzle are integrated.
Other configurations of the present invention will be apparent from the description of the embodiments to be described later.
Effects of the invention
According to the present invention, it is possible to provide an ink jet recording apparatus having a print head which realizes high-precision positioning of a charged electrode and which has a reduced number of components.
Drawings
Fig. 1 is an overall external 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 a print head of embodiment 1 of the present invention.
Fig. 4 is a front view, a plan view, and a side view of the print head of fig. 2.
Fig. 5 is a perspective view of a charged electrode and a charged electrode block in example 1 of the present invention.
Fig. 6 is 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 Description
Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below. In the following drawings, the same devices are denoted by the same reference numerals (reference numerals), and the description of the devices already described may be omitted.
Example 1
Embodiment 1 of the present invention will be described with reference to fig. 1 to 6. Fig. 1 is an overall external view of an inkjet recording apparatus, fig. 2 is a view showing a print head according to embodiment 1 of the present invention, fig. 3 is an exploded view of the print head, fig. 4 is a front view, a plan view, and a left side view of the print head, fig. 5 is a view showing a charging electrode and a charging electrode block according to embodiment 1, and fig. 6 is a front view, a plan view, and a left side view of fig. 5.
(Overall Structure of ink jet recording apparatus)
First, the overall structure of the inkjet recording apparatus will be described with reference to fig. 1.
In fig. 1, an inkjet recording apparatus 100 has a main body 101, a cable 102, a print head 103, and a control section 104. Provided in the main body 101 are: an ink tank for supplying ink; a supply path; an electromagnetic valve and a pump provided in the middle of the supply path; a recovery path for recovering unused ink; an electromagnetic valve and a pump provided in the middle of the recovery path. Ink is supplied to the printhead 103 via a path within the cable 102. In the print head 103, the supplied ink is granulated and discharged by the nozzles, and the ink particles are charged by the charging electrodes at a voltage corresponding to the character to be printed. Then, the ink is deflected by the deflection electrodes in accordance with the amount of charge, and flies to the printed matter to perform printing. Ink not used for printing is captured (caught) to the gutter, and recovered from the printhead 103 to an ink container within the body 101 via a path within the cable 102. The control unit 104 includes a power supply, a substrate, and an operation panel. The control unit 104 performs overall control such as supply of power necessary for printing by the inkjet recording apparatus, transmission of various signals necessary for printing by the inkjet recording apparatus, and reception of signals from sensors and the like outside the control unit.
In addition, since the gist of the present invention is a constituent part of the print head 103 of the inkjet recording apparatus 100, embodiment 1 of the present invention will be explained below centering on the structure and arrangement of the print head 103.
(Structure and arrangement of print head)
Next, the structure and arrangement of the print head of embodiment 1 of the present invention will be described with reference to fig. 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. Fig. 4 shows a front view, an upper surface portion, and a left side view of the print head shown in fig. 2, respectively, (a) is a view showing the front view of the print head, (B) is a view showing a top view, and (C) is a view showing the left side view. In fig. 4, the nozzle protector 6 of fig. 2 is not shown. Fig. 5 is a perspective view of a charged electrode and a charged electrode block.
In fig. 2, the nozzle body 1 shown in fig. 3 and 4 is provided in the nozzle protector 6. Herein, 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 charging electrode 11. A voltage is applied to the charging electrode 11 with respect to the passing ink particles, thereby charging each ink particle in accordance with the applied voltage. In this embodiment 1, as shown in fig. 5, the charging electrode 11 is inserted into the groove 10c of the charging electrode block 10. As shown in fig. 3, the charged electrode block 10, the orifice assembly 9, and the O-ring 8 are fixed to the nozzle body 1 by integrated fixing screws (or screws such as bolts) 12a to 12 d. The nozzle protector 6 is fixed by nozzle protector fixing screws 16a to 16 c. In addition, these constituent devices are fixed to the base 23 by nozzle base fixing screws 21. The leveling screw 17 and leveling spring 18 are provided for adjusting the ink jet in the horizontal direction. The vertical adjustment screw 19 and the vertical adjustment spring 20 (not shown in fig. 2, see fig. 4) are provided for adjusting the ink jet in the vertical direction.
As shown in fig. 3, the nozzle body 1 is assembled with an electrostrictive element 2, a weight 3, an ink supply tube 4, and an ink recovery tube 5. The ink recovery tube 5 is a tube for recovering the ink supplied to the nozzle body 1 to the ink cartridge by a pump when the apparatus is stopped. The nozzle body 1 is assembled to the nozzle protector 6 and fixed to the nozzle base 15 by the nozzle body fixing screw 7.
As is clear from fig. 3, the nozzle body 1 is assembled in the order of the O-ring 8, the orifice assembly 9, and the charging electrode block 10, and is fixed by using the integrated fixing screws 12a to 12d that fix the charging electrode 11 and the orifice assembly.
(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 fig. 5 and 6. As shown in fig. 5 and 6 (C), the charging electrode block 10 is configured such that a vertical groove 10C is formed in the center portion, and the charging electrode 11 is fitted (inserted) into the groove 10C. In addition, the arrows in fig. 5 indicate the direction of attachment/detachment of the charged electrode block and the charged electrode. In this structure, the ink jet (ink particles) passes through the inside of the charged electrode 11 inserted into the slot 10 c.
As shown in fig. 2 to 5 and 6 (B), the charged electrode 11 has a screw groove formed in a flat portion of the upper surface, and the charged wire 13 and the charged electrode 11 are fixed by a charged wire fixing screw 14. As shown in fig. 5 and 6 (C), 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 pressed by an elastic force (spring force) and fixed to the side surface of the groove 10C. Therefore, the charged electrode 11 in this embodiment has a bent portion 11 a. The curved portion 11a serves as an electrode portion for applying a voltage to the ink particles, and the ink particles pass through the inside thereof. By adopting the structure of the bent portion 11a, the charged electrode block 10 and the charged electrode 11 are positioned with high accuracy. That is, the bent portion 11a (U-shaped bent portion in the embodiment) functions as follows: when the charging electrode 11 is inserted into the groove 10c of the charging electrode block 10, the spring force acts, and a certain pressing force (elastic force) is applied in the width direction of the groove, whereby the width direction of the groove of the charging electrode is positioned, and the charging electrode 11 and the charging electrode block 10 are brought into close contact with each other by the spring force and are not easily detached. The bent portion 11a may not have a U-shape. The vertical length of the charging electrode 11 and the depth of the groove 10c are determined in advance so that the position where the lower end of the charging electrode 11 contacts the bottom surface of the groove 10c when the charging electrode 11 is inserted into the charging electrode block 10 and the charging electrode 11 are positioned in the vertical direction. By adopting such a configuration, the charging electrode block 10 and the charging electrode 11 are accurately positioned, and the charging electrode block 10, the hole assembly 9, and the O-ring 8 are fixed to the nozzle body 1 by the integrated fixing screws 12a to 12d (see fig. 3), so that the positional relationship between the charging electrode 11 and the passing position of the ink particles ejected from the nozzle body 1 is accurate, and the printing quality is not affected.
In this embodiment, as shown in fig. 5 and 6, threaded holes 10a and 10b are provided at both ends of an insertion port of a groove 10c of a charged electrode block 10, threaded hole assemblies 9a and 9b are also formed at corresponding positions in a hole assembly 9, and the charged electrode block 10, the hole assembly 9, and an O-ring 8 are fixed to a nozzle body 1 by integrated fixing screws 12a and 12 b. As shown in fig. 3, screw holes 9c and 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 integrated fixing screws 12c and 12 d. In this embodiment, both sides of the bottom portion side of the groove 10c of the charged electrode block (both sides of the lower portion of the charged electrode block as shown in fig. 5 and 6) are narrowed. That is, the both side members are removed (cut). Therefore, the integrated fixing screws 12c and 12d fix the orifice assembly 9, the O-ring 8, and the nozzle body 1 as one body without fixing the charged electrode block 10. In addition, the charging electrode 11 in this example 1 uses a stainless material in order to exert the elastic force, but the present invention is not limited thereto.
As is apparent from fig. 2 to 4, in this embodiment, since the charging electrode 11 is inserted into the groove provided in the charging electrode block to position the charging electrode and the charging electrode block, the charging electrode back cover and the charging electrode front cover as described in patent document 1 are not necessary, and the number of components can be reduced. And thus miniaturization of the print head (especially shortening of the length of the print head) can be achieved.
The details of the structures of the charging electrode 11 and the charging electrode block 10 will be described later.
(printing action)
In 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 in the center of the orifice assembly 9. At this time, by applying a voltage to the electrostrictive element 2 and vibrating the vibrator located in the nozzle body 1, the ink in the nozzle body 1 is vibrated, and the ink is granulated while flying in the space in the charged electrode block 10. The granulated ink (ink particles) is charged by a voltage applied to the charging electrode 11 inserted and positioned in the groove 10c of the charging electrode block 10. Then, the flying direction of the ink is determined by electrostatic force generated by a deflection electrode not shown, and ink particles are attached to a print target to perform printing. Ink particles not used for printing are captured by a groove not shown and circulated to the ink recovery tube 5, and are recovered to the ink cartridge in the main body 101 by a recovery pump provided in the recovery path. In this way, in order to recover ink particles not used for printing, it is necessary to adjust the orientation of the nozzle by the ink-beam adjusting mechanism so that the ink particles (ink beams) go to the gutter.
(ink jet regulating mechanism)
Next, the ink-jet adjusting mechanism will be explained.
In fig. 4, in the adjustment of the horizontal direction of the ink jet, a horizontal adjustment screw 17 and a horizontal adjustment spring 18 are used. The horizontal adjustment mechanism is configured such that a horizontal adjustment screw 17 is inserted into a threaded hole of the nozzle base 15 by passing the horizontal adjustment screw 17 through a horizontal adjustment spring 18. The screw head side of the leveling screw 17 passes through a notch portion provided at the top of the support portion of the base 23 of the print head. By rotating the leveling screws 17, the distance between the notched portion of the base 23 and the nozzle base 15 is adjusted while receiving the reaction force of the leveling springs 18. A columnar boss of the base 23 is present at a position close to the ink ejection port, and the boss serves as a fulcrum of the nozzle portion, and the horizontal direction of the ink jet bundle can be arbitrarily determined by tightening or loosening the horizontal adjustment screw 17. 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 screw 21 is tightened to fix the nozzle base 15.
Next, a method of adjusting the direction of the print head perpendicular to the surface of the base 23 will be described with reference to fig. 4.
In the adjustment of 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 such that a vertical adjustment screw 19 is inserted into a threaded hole of the nozzle base 15 by inserting the vertical adjustment screw 19 through a vertical adjustment spring 20. The notched portion of the nozzle protector 6 is sandwiched between the screw head of the vertical adjustment screw 19 and the vertical adjustment spring 20, and the distance between the notched portion of the nozzle protector 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 screwing or unscrewing the vertical adjustment screw 19 with the hollow circular boss, not shown, of the nozzle guard 6 as a fulcrum. When the ink jet is adjusted, 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.
(details of the charged electrode and the charged electrode Block)
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, and therefore, the description will be made in more detail with reference to fig. 5 and 6. Fig. 5 is a perspective view showing the charging electrode 11 and the charging electrode block 10. Fig. 6 is a front view, a plan view, and a left side view of fig. 5, where (a) is the front view, (B) is the plan view, and (C) is the left side view.
In fig. 5 and 6, a groove 10c is formed in the center of the charged electrode block 10. In example 1, the charged electrode block was fixed to 2 sites. Specifically, both sides (2) of the charged electrode insertion side of the groove 10c of the charged electrode block 10 are fixed. Therefore, screw holes 10a and 10b for passing the integrated fixing screws 12a and 12b are provided. The reason why the both sides of the insertion side of the charging electrode 11 are fixed is that even in the case of fixing by 2 integrated fixing screws, the positional relationship between the ink particles and the charging electrode in the traveling direction of the ink particles does not change, and the printing quality can be maintained with high accuracy. That is, even when the fixing force of the integrated fixing screw is loosened and the charged 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 does not affect the variation in the distance between the inside of the charged electrode 11 and the ink particles in the ejection direction of the ink particles, and therefore, the printing quality can be maintained with high accuracy.
Further, by the screw-fixing of 2 portions on both sides, several advantages are produced. One is that the other integrated fixing screws 12c, 12d do not need to fix the lower side of the charged electrode block 10 (the cut-away portion of the bottom of the groove 10 c). Therefore, the integrated fixing screws 12c and 12d may be only required to fix the orifice assembly 9, the O-ring 8, and the nozzle body 1, and screws shorter than the screws 12a and 12b may be used. Further, if it is not necessary to fix the lower side of the charging electrode block 10, it is not necessary to provide screw holes on the lower side of the charging electrode block 10 (both sides of the bottom of the groove 10 c), and therefore, this region can be cut (removed) and narrowed. This increases the exposed area of the orifice assembly 9, and has the effect of facilitating cleaning of the inside of the print head.
The charging electrode 11 has bent portions 11a so as to press both sides of the groove 10c by its elastic force when inserted into the groove 10c of the charging electrode block 10. The shape of the bent portion 11a is not limited to the U shape, and may be any shape as long as a pressing force of a constant pressure is generated at the time of insertion and the charged electrode does not move in the vertical direction (the depth direction of the groove). The material used for the charging electrode 11 does not need to be stainless steel, and may be an elastic material that generates a pressing force of a certain pressure 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 into the groove are set to be substantially the same, the charging electrode 11 can be positioned with high accuracy by completely inserting the charging electrode 11 into the groove.
(Effect of embodiment 1 of the present invention)
As described above, according to example 1 of the present invention, the distance between the charging electrode and the ink particles can be kept constant even with a small number of components, 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 apparatus can be realized. In addition, since the number of components in the longitudinal direction of the print head can be reduced, miniaturization can be achieved. Further, since the number of parts is small, disassembly and assembly for cleaning and inspection are simplified, and the trouble of work can be reduced.
Example 2
Next, example 2 of the present invention will be explained.
First, the print head of embodiment 2 is basically the same structure as fig. 1 to 5 in embodiment 1. Therefore, the drawings as shown in fig. 1 to 5 in example 2 are not described, and the description thereof is also omitted. The structure of the charging electrode and the charging electrode block in example 2 is different from that in example 1. Therefore, the description of example 2 will be mainly focused on the structures of the charging electrode 11 and the charging electrode block 10.
(Structure of charged electrode and charged electrode Block in example 2)
The structure of the charged electrode and the charged electrode bulk in example 2 is shown in fig. 7. Fig. 7 (a) shows a state before the charging electrode 11 is inserted into the charging electrode block 10 or after being removed from the charging electrode block 10. Fig. 7 (B) shows a state in which 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 a side surface of the groove 10 c. 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 the triangular shape, and there is no problem even if it is, for example, a circular arc shape, a trapezoidal shape, a rectangular shape, or the like. That is, the recess 10d may have any shape as long as it functions as a stopper for positioning the charging electrode 11 when it is inserted into the groove 10 c.
In addition, one charged electrode 11 is provided with a triangular projection 11 b. The shape of the convex portion 11b is selected to fit well into the concave portion 10 d. 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 convex portion 11b is a predetermined position in the groove length direction of the charging electrode block 10 and the charging electrode 11.
That is, when the assembly is performed so as to change from the state of fig. 7 (a) to the state of fig. 7 (B), the assembly at a predetermined position can be completed only by inserting the charging electrode 11 to a position where the convex portion 11B thereof fits in the concave portion 10d of the charging electrode block 10. When the charging electrode 11 and the charging electrode block 10 are removed from the assembled state, the charging electrode 11 may be pulled out while being biased in a direction to release the fitting.
(Effect of example 2)
According to embodiment 2 of the present invention, the same effects as those of embodiment 1 of the present invention described above are obtained, and the assembly of the charging electrode 11 and the charging electrode block 10 and the positioning thereof are simplified.
Example 3
Next, example 3 of the present invention will be explained.
First, the print head of embodiment 3 is basically the same structure as fig. 1 to 5 in embodiment 1. Therefore, the drawings as shown in fig. 1 to 5 in example 1 are not described, and the description thereof is also omitted.
The structure of the charging electrode and the charging electrode block in example 3 is different from those in examples 1 and 2. Therefore, the description of example 3 will be mainly focused on the structures of the charging electrode 11 and the charging electrode block 10. Further, embodiment 3 of the present invention is similar to embodiment 2 described above, and therefore, the description of the portions overlapping with the description of embodiment 2 is also omitted.
(Structure of charged electrode and charged electrode Block in example 3)
The structure of the charging electrode and the charging electrode block in example 3 is shown in fig. 8. Fig. 8 (a) shows a state before the charging electrode 11 is inserted into the charging electrode block 10 or after the charging electrode 11 is removed from the charging electrode block 10. Fig. 8 (B) 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 a side surface of the groove 10 c. The convex portion 10e in this embodiment has a circular arc-shaped cross section. The cross-sectional shape of the convex portion 10e is not limited to the circular arc shape, and may be, for example, a triangular shape, a trapezoidal shape, a rectangular shape, or the like. That is, the projection 10e 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 10 c.
In addition, the charging electrode 11 is provided with a concave portion 11c having an arc shape. The cross-sectional shape of the concave portion 11c may be a shape that can be fitted like the convex portion 10 e. That is, the shape is not limited to the circular arc shape, and for example, a triangular shape, a trapezoidal shape, a rectangular shape, or the like has no problem. When the charging electrode 11 is inserted into the groove 10c of the charging electrode block 10, the position of the concave portion 11c is fitted to the convex portion 10e 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 the assembly is performed so as to change from the state of fig. 8 (a) to the state of fig. 8 (B), the assembly at the predetermined positioning can be completed only by inserting the charging electrode 11 to the position where the concave portion 11c is fitted to the convex portion 10e of the charging electrode block 10. When the charging electrode 11 and the charging electrode block 10 are removed from the assembled state, the charging electrode 11 may be pulled out by being biased in a direction to release the fitting between them.
(Effect of example 3)
According to embodiment 3 of the present invention, the same effects as those of embodiment 2 of the present invention are obtained.
Example 4
Next, example 4 of the present invention will be explained.
First, the print head of embodiment 4 has basically the same structure as fig. 1 to 5 in embodiment 1.
Therefore, in example 4, the descriptions of the drawings shown in fig. 1 to 5 are omitted, and the description thereof is also omitted. The configuration of the charging electrode and the charging electrode block in example 4 is different from those in examples 1 to 3. Therefore, the description of example 4 will be mainly focused on the structures of the charging electrode 11 and the charging electrode block 10.
(Structure of charged electrode and charged electrode Block in example 4)
The structure of the charged electrode and the charged electrode bulk in example 4 is shown in fig. 9. In fig. 9, (a) shows a state before the charging electrode 11 is inserted into the charging electrode block 10 or after being removed from the charging electrode block 10. Fig. 9 (B) shows a state in which 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 10c of the charging electrode block 10 is the same as in the above-described embodiment. In this embodiment, a pressing member 11d is prepared in order to press the charging electrode 11 against the side surface of the groove 10c of the charging electrode block 10. As a material of the pressing member 11d, a non-conductive material such as rubber can be used.
In this embodiment, after the charging electrode 11 is inserted into the groove 10c of the charging electrode block 10, as shown in fig. 9 (B), the pressing member 11d is inserted into the groove and assembled. The reverse flow is the case in the decomposition.
(Effect of example 4)
Embodiment 4 of the present invention has the same effects as the above-described embodiments. In this embodiment, the pressing member 11d is required, but the degree of freedom in selecting the material used for the charging electrode increases. That is, in the above-described embodiment, the charging electrode is made of a conductive elastic material, but in the case of embodiment 4, since the charging electrode 11 and the side surface of the groove 10C of the charging electrode block 10 are configured to be pressed by the pressing member 11d, there is an advantage that any material can be used as long as the charging electrode is made of a conductive material (for example, aluminum).
Other embodiments
The present invention is not limited to the above-described embodiments, and various modifications are included within the scope not departing from the gist of the present invention. The above-described embodiments are described in detail for easy understanding of the present invention, and are not limited to the embodiments including all the structures described. In addition, a part of the structure of one embodiment may be replaced with the structure of another embodiment, and the structure of another embodiment may be added to the structure of one embodiment. The structure of each embodiment can be added, deleted, or replaced with another structure.
Description of the reference numerals
1 … … nozzle body
2 … … electrostrictive element
3 … … balance weight
4 … … ink supply tube
5 … … ink recovery tube
6 … … nozzle protector
7 … … nozzle body set screw
8 … … O-ring
9 … … hole assembly
9 a-9 d … … threaded holes
10 … … charged electrode block
10a, 10b … … threaded hole
10c … … groove
10d … … concave part
10e … … convex part
11 … … charged electrode
11a … … bend
11b … … convex part
11c … … recess
11d … … pressing component
12 a-12 d … … integrated fixing screw
13 … … live wire
14 … … fixing screw with live wire
15 … … nozzle base
16 a-16 c … … nozzle sheath fixing screw
17 … … horizontal adjusting screw
18 … … horizontal adjusting spring
19 … … vertical adjusting screw
20 … … vertical adjustment spring
21 … … nozzle base fixing screw
22 … … nozzle base fixing screw
23 … … base
100 … … ink jet recording apparatus
101 … … Main body
102 … … Cable
103 … … printhead
104 … … control section.
Claims (8)
1. An ink jet recording apparatus including a main body to which ink is supplied and a print head that receives the supply of the ink and performs printing, characterized in that:
the print head includes: a nozzle that ejects ink; an orifice assembly through which the granulated ink particles ejected from the nozzle pass; and a charging electrode for charging the ink particles passed through the orifice member,
the ink jet recording apparatus includes a block-shaped charged electrode block having a groove in a central portion thereof,
pressing a side surface of the slot and the charging electrode with an elastic force in a state where the charging electrode is inserted into the slot of the charging electrode block,
the charged electrode block, the orifice assembly, and the nozzle are constructed as one body.
2. The inkjet recording apparatus as claimed in claim 1, wherein:
threaded holes are provided on both sides of the groove of the charged electrode block, and the charged electrode block, the hole assembly, and the nozzle are integrated by using 2 integration screws via the threaded holes.
3. The inkjet recording apparatus as claimed in claim 2, wherein:
portions of both sides of the bottom of the groove of the charged electrode block are removed.
4. The inkjet recording apparatus as claimed in claim 1, wherein:
the charged electrode is provided with a bent portion that generates the elastic force at the time of the insertion.
5. The inkjet recording apparatus as claimed in claim 1, wherein:
a concave portion is provided on a side surface of the groove of the charged electrode block,
the charged electrode has a convex portion on a side surface contacting the concave portion,
when the charging electrode is inserted into the groove of the charging electrode block, the convex portion is fitted into the concave portion.
6. The inkjet recording apparatus as claimed in claim 1, wherein:
a convex portion is provided on a side surface of the groove of the charged electrode block,
a concave portion is provided on a side surface of the charged electrode which is in contact with the convex portion,
when the charging electrode is inserted into the groove of the charging electrode block, the concave portion is fitted with the convex portion.
7. The inkjet recording apparatus as claimed in claim 1, wherein:
set to 4.
8. An ink jet recording apparatus including a main body to which ink is supplied and a print head that receives the supply of the ink and performs printing, characterized in that:
the print head includes: a nozzle that ejects ink; an orifice assembly through which the granulated ink particles ejected from the nozzle pass; and a charging electrode for charging the ink particles passed through the orifice member,
the ink jet recording apparatus includes a block-shaped charged electrode block having a groove in a central portion thereof,
the charged electrode is configured to have an elastic force that expands the width of the electrode portion of the charged electrode in the width direction of the slot,
a width of the charged electrode is a constant value when an end of the charged electrode is inserted into the slot of the charged electrode,
the charged electrode block, the orifice assembly, and the nozzle are constructed as one body.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019220989 | 2019-12-06 | ||
| JP2019-220989 | 2019-12-06 | ||
| PCT/JP2020/019775 WO2021111657A1 (en) | 2019-12-06 | 2020-05-19 | Inkjet recording device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114728521A true CN114728521A (en) | 2022-07-08 |
| CN114728521B CN114728521B (en) | 2023-05-02 |
Family
ID=76222508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080074903.8A Active CN114728521B (en) | 2019-12-06 | 2020-05-19 | Ink jet recording apparatus |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7316376B2 (en) |
| CN (1) | CN114728521B (en) |
| WO (1) | WO2021111657A1 (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59188445A (en) * | 1983-04-11 | 1984-10-25 | Ricoh Co Ltd | Deflecting electrode holding structure for ink jet recorder |
| GB2139962A (en) * | 1983-04-11 | 1984-11-21 | Ricoh Kk | Ink jet printer carriage |
| JPH10296997A (en) * | 1997-04-25 | 1998-11-10 | Hitachi Ltd | Ink jet recorder |
| CN1247504A (en) * | 1996-12-23 | 2000-03-15 | 多米诺印刷科学公开有限公司 | Continuous inkject printhead |
| CN1288416A (en) * | 1998-12-25 | 2001-03-21 | 松下电器产业株式会社 | Ink jet recording apparatus |
| US20090027460A1 (en) * | 2007-07-23 | 2009-01-29 | Paul Klinker | System for aligning a charge tunnel of an ink jet printer |
| CN105082764A (en) * | 2014-05-08 | 2015-11-25 | 株式会社日立产机系统 | Ink jet recording apparatus |
| JP2015229325A (en) * | 2014-06-06 | 2015-12-21 | 株式会社日立産機システム | Ink jet recording device |
| CN109808310A (en) * | 2019-03-07 | 2019-05-28 | 韦怡 | A kind of ink jet numbering machine continuous inkjet printing equipment |
-
2020
- 2020-05-19 WO PCT/JP2020/019775 patent/WO2021111657A1/en active Application Filing
- 2020-05-19 JP JP2021562447A patent/JP7316376B2/en active Active
- 2020-05-19 CN CN202080074903.8A patent/CN114728521B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59188445A (en) * | 1983-04-11 | 1984-10-25 | Ricoh Co Ltd | Deflecting electrode holding structure for ink jet recorder |
| GB2139962A (en) * | 1983-04-11 | 1984-11-21 | Ricoh Kk | Ink jet printer carriage |
| CN1247504A (en) * | 1996-12-23 | 2000-03-15 | 多米诺印刷科学公开有限公司 | Continuous inkject printhead |
| JPH10296997A (en) * | 1997-04-25 | 1998-11-10 | Hitachi Ltd | Ink jet recorder |
| CN1288416A (en) * | 1998-12-25 | 2001-03-21 | 松下电器产业株式会社 | Ink jet recording apparatus |
| US20090027460A1 (en) * | 2007-07-23 | 2009-01-29 | Paul Klinker | System for aligning a charge tunnel of an ink jet printer |
| CN105082764A (en) * | 2014-05-08 | 2015-11-25 | 株式会社日立产机系统 | Ink jet recording apparatus |
| JP2015229325A (en) * | 2014-06-06 | 2015-12-21 | 株式会社日立産機システム | Ink jet recording device |
| CN109808310A (en) * | 2019-03-07 | 2019-05-28 | 韦怡 | A kind of ink jet numbering machine continuous inkjet printing equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2021111657A1 (en) | 2021-06-10 |
| WO2021111657A1 (en) | 2021-06-10 |
| JP7316376B2 (en) | 2023-07-27 |
| CN114728521B (en) | 2023-05-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2717609B2 (en) | High density inkjet printhead | |
| US8226215B2 (en) | Jetting module install mechanism | |
| US4800398A (en) | Ink-jet printer with an encased printer head unit | |
| EP1243417A2 (en) | Flextensional transducer | |
| EP0482123B1 (en) | Continuous ink jet printer | |
| CN114728521A (en) | Ink jet recording apparatus | |
| EP1243418A1 (en) | Flextensional transducer assembly including array of flextensional transducers | |
| JP5617444B2 (en) | Grounding structure and recording device | |
| US6848774B2 (en) | Ink jet printer deflection electrode assembly having a dielectric insulator | |
| CA1224669A (en) | Ink jet printer and method of start-up and shutdown thereof | |
| US6561629B2 (en) | Charging/deflecting device capable of effectively deflecting ink droplet | |
| CN109153260B (en) | Modular printhead assembly with common central rail | |
| CN109153261B (en) | Printhead assembly with removable jetting module | |
| US9365043B2 (en) | Liquid ejection head | |
| JP6546858B2 (en) | Ink jet recording device | |
| US10899149B2 (en) | Device for arranging a print head in a certain position | |
| EP0966357A1 (en) | Continuous inkjet printhead | |
| KR20070035041A (en) | High voltage arm assembly with integrated resistor, automatic high voltage deflection electrode locator, and special insulation | |
| EP0439275B1 (en) | Continuous ink jet printer | |
| JPH0732590A (en) | Recording apparatus, electronic instrument and recording head carrier | |
| JP4571385B2 (en) | Z-axis reference setting of print head assembly / support structure in printing apparatus | |
| WO1998028152A1 (en) | Flexure for continuous inkjet printer | |
| JP3133222B2 (en) | Printhead for inkjet recording device | |
| US7712871B2 (en) | Method, apparatus and printhead for continuous MEMS ink jets | |
| CN101765503A (en) | Removable drive electronics unit for high resolution print engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |