JPS5845950B2 - inkjet recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inkjet recording apparatus.

Conventionally, this type of apparatus has been constructed as shown in FIG.

In FIG. 1, 1 indicates a plurality of ink supply ports 1a on the front wall.
and a diaphragm (not shown) behind these ink supply ports 1a, 2 has a plurality of nozzle holes 2a on the front side, and these nozzles on the back side. Hole 2a
This multi-nozzle plate is provided with a plurality of recesses 2b communicating with the ink supply ports 1a and corresponding to the respective ink supply ports 1a, and this multi-nozzle plate 2 is attached to the front surface of the front wall of the head 1.

By the way, in order to provide the nozzle holes 2a and the recesses 2b in the multi-nozzle plate 2, first, in the first step, the multi-nozzle plate with a plate thickness of 0.1 to 0.5 mm is degreased, polished, pickled, and cleaned. Apply a photoresist 3 on the surface of the photoresist 3 (see Fig. 2C), and apply the light from the light source 5 to the photoresist 3 through the original plate 4 on which the pattern 4a of the recesses 2b is drawn (see Fig. 2). The etching solution 6 was applied to the multi-nozzle plate 2, and the pattern of the recesses 2b was developed and the exposed photoresist 3 was washed away (see Figure 2C). The plate 2 is etched to form the recesses 2b (see Figure 2C), and when the thickness between the front surface of the multi-nozzle plate 2 and the recesses 2b reaches 30μ, the etching solution 6 is washed away and the recesses 2b are etched. The etching is stopped and the photoresist 3 is removed (see FIG. 2C).

Next, in the secondary process, photoresist 3 is applied again to the surface of multi-nozzle plate 2 where recesses 2b are provided (see Figure 2C).
The light from the light source 5 is applied to the photoresist 3 through the original plate 7 on which the pattern 7a of the nozzle holes 2a is drawn (see Fig. 2g), and the photoresist 3 is immersed in a developer to develop the pattern of the nozzle holes 2a and exposed. Etching liquid 6 is applied to the multi-nozzle plate 2 from which the photoresistor 3 has been washed away (see second diagram), and the multi-nozzle plate 2 is further etched in the recess 2b where the photoresistor 3 was removed to form the nozzle hole 2a. (see FIG. 2C), when the space between the front surface of the multi-nozzle plate 2 and the recess 2b is penetrated, the etching liquid 6 is washed away and the nozzle hole 2
By stopping the etching of a and peeling off the photoresist 3 (see FIG. 2C), nozzles 2a and recesses 2b are formed in the multi-nozzle plate 2.

In the conventional example configured in this way, the head 1 has the multi-nozzle plate 2 attached to the front wall of the front wall with the recesses 2b of the multi-nozzle plate 2 corresponding to the ink supply ports 1a of the head 1, respectively. A diaphragm (not shown) provided at the rear is vibrated to eject ink supplied into the head 1 from the nozzle holes 2a of the multi-nozzle plate 2 as ink droplets.

However, the nozzle holes 2a formed in the multi-nozzle plate 2 are not necessarily formed perpendicularly to the surface of the multi-nozzle plate 2, and the pressure applied to the ink in the head 1 causes the multi-nozzle plate to 2 is bent, the direction of the nozzle hole 2 moves, and the ink droplets ejected from the nozzle hole 2a do not fly in the desired direction, resulting in a reduction in the resolution of the reproduced image.

In order to eliminate the drawbacks of the above-mentioned conventional example, the present invention provides a multi-nozzle system around the nozzle holes by pressing the tip of an adjustment screw screwed onto a support plate against a multi-nozzle plate provided with a groove around the nozzle holes. The present invention provides an inkjet recording device that improves the resolution of a reproduced image by bending a plate and adjusting the jetting direction of ink droplets jetted from nozzle holes.

Hereinafter, embodiments of "Ki-ni ψ" will be described in detail with reference to the drawings.

FIG. 3 shows an embodiment of the present invention, in which the same reference numerals as in FIG. Nozzle hole 2
This groove 2c is a groove provided concentrically with respect to a, and in the first step of manufacturing the multi-nozzle plate 2, a photoresist is formed through an original plate (not shown) on which a pattern of recesses 2b and grooves 2c is drawn. 3 was exposed to light and etched into the multi-nozzle plate 2 along with the depressions 2b using an etching solution 6.

Reference numeral 8 denotes a support plate provided with a plurality of holes 8a for passing ink droplets, and three adjusting screws 9 screwed around the holes 8a. The nozzle plate 2 is attached to the front surface of the front wall of the head 1 so as to cover the front surface of the nozzle plate 2, which is attached to the front surface of the front wall of the head 1, with the ink supply ports 1a and nozzle holes 2a corresponding to each other.

In the embodiment configured in this way, the tip is connected to the nozzle hole 2a.
By changing the screwing amount of the adjusting screw 9 that is in contact with the front surface of the multi-nozzle plate 2 between the groove 2c and the groove 2c and adjusting the degree of deflection of the multi-nozzle plate 2 inside the groove 2c, the nozzle hole 2a
Because the direction of each adjustment screw 9 changes, even if the ink droplet ejected from the nozzle hole 2a does not fly in the desired direction, each adjustment screw 9
By changing the amount of screwing in, ink droplets can be ejected in a desired direction.

FIG. 4 shows another embodiment of the present invention, in which the same reference numerals as in FIG. A porous plate 12 provided with a plurality of nozzle holes 12a was bonded to a substrate 11 provided with an ink supply hole 11a and a concentric groove 11b, with each ink supply hole 11a and nozzle hole 12a corresponding to each other. It is a multi-nozzle plate.

In the embodiment configured in this way, ink droplets can be ejected in a desired direction similarly to the inkjet recording apparatus shown in FIG. Since these are separate bodies, it is possible to individually form grooves 11b in the substrate 11 with ink supply holes 11a previously formed therein by press working or the like, and nozzle holes 12a in the perforated plate 12, so that the multi-nozzle plate 10
The manufacturing speed of the multi-nozzle plate 10 can be improved and the manufacturing cost of the multi-nozzle plate 10 can be reduced.

As described above, according to the present invention, the ejection direction of ink droplets can be adjusted by changing the screwing amount of the adjustment screw, so there is an advantage that the resolution of the reproduced image can be improved.

[Brief explanation of the drawing]

Fig. 1a is a configuration diagram of a conventional inkjet recording device, Fig. 1 is a rear view of a conventional multi-nozzle plate, Fig. 1C is a sectional view taken from line A-A in Fig. 1, and Fig. 2 3A is a rear view of a multi-nozzle plate according to an embodiment of the present invention; FIG. 3A is a sectional view taken along line B-B in FIG. 3A; Figure C is a configuration diagram of one embodiment of the present invention, Figure 3 d is a sectional view taken from line CC in Figure 3 C, and Figure 4
The figure is a sectional view of another embodiment of the invention. 1... Head, 1a... Ink supply port, 2, 10.
...Multi-nozzle plate, 2a, 12a...Nozzle hole, 2
b...dent, 2c, Llb...groove, 3...photoresist, 4.7...original plate, 4a, 7a...pattern, 5...light source, 6...etching liquid, 8...
Support plate, 8a...hole, 9...adjustment screw, 11...
Substrate, 11a... Ink supply hole, 12... Perforated plate.

Claims (1)

[Claims] 1. A head with a plurality of ink supply ports provided on the front wall and a diaphragm provided behind each of the ink supply ports, and grooves provided around each of the plurality of nozzle holes, and the nozzle holes connected to the ink supply port. A multi-nozzle plate is attached to the front wall of the head in correspondence with each hole, and one or more adjustment screws are screwed around each of the plurality of holes, and each of the holes is made to correspond to the nozzle hole. and a support plate mounted on the front surface of the multi-nozzle plate, and the adjustment screw has its tip abutted on the multi-nozzle plate between the nozzle hole and the groove, and the adjustment screw is screwed in by changing the screwing amount to adjust the nozzle hole and the groove. An inkjet recording apparatus characterized in that the multi-nozzle plate between the grooves is bent to change the direction of the nozzle holes to adjust the ejection direction of ink droplets ejected from the nozzle holes.