JPS60262651A - Ink jet injection device - Google Patents

Abstract

PURPOSE:To set a constant distance between a nozzle and paper by mounting an ink jet head consisting of a head substrate and a positioning part provided on the former, on a carriage having a positioning part. CONSTITUTION:An ink channel is formed by forming a nozzle 21, a pressure chamber 22 and an ink supply path 23 as a groove on a head substrate 1 and sticking a vibrator 2. A front convex part 4 and a back convex part 5 are integrally formed on the head substrate 1 as a positioning part, and then are set in a front groove 14 and a back groove 15 of a carriage 11. In this way, a head 30 is fixed to the carriage 11 by a fixing spring 17. THus the head substrate 1 is fixed to the carriage 11 at three spots without fail.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an inkjet ejection device. In detail, this article relates to an inkjet jetting device in which the entire inkjet head is securely and easily fixed to a carriage.

<Prior Art> In an inkjet head, if the distance between the nozzle and the paper is not kept constant, the print quality will be seriously affected. As the distance between the nozzle and the paper increases, ink droplets ejected from the nozzle become more susceptible to air flow, carriage speed, and the like. Furthermore, if the distance between the nozzle and the paper is short, the print quality improves, but there is a high possibility that the nozzle will be rubbed by the paper, making it easier for dust to adhere and air bubbles to be mixed in from the nozzle.

For this purpose, the head was fixed to the carriage, and a mechanism was used to finely adjust the distance between the nozzle and the paper.

<Object of the Invention> An object of the invention is to set the distance between the nozzle and the paper constant. Another object of the present invention is to provide an entire inkjet jetting apparatus that can easily determine the nozzle-to-paper distance without requiring any mechanism such as fine adjustment.

<Structure of the Invention> The inkjet ejecting device of the present invention has a nozzle, a pressure chamber, an ink supply path, etc. formed as a groove on a head substrate, and an inkjet head having a positioning portion and an inkjet head mounted on the distribution head substrate. and a carriage having a positioning section.

Hereinafter, the head portion of the inkjet ejecting apparatus of the present invention will be explained in particular detail.

<Example> Embodiments of the present invention will be described below based on the drawings.

Fig. 1(a) (b) shows an embodiment of the present invention, Fig. 1(b) is a perspective view of a head substrate 1, and the head substrate 1 is made of plastic injection molding, ceramic, etc. A nozzle 21, a pressure chamber 22, and an ink supply path 26 are formed as grooves on the diaphragm 1, and the ink flow path is created by bonding the diaphragm 2 and the RAD substrate 1 together.

Further, a tank 6 is constructed following the ink supply path 23 and is supplied with ink.

Further, a front convex portion 4 and a rear convex portion 5 are integrally formed on the head substrate 1 as a positioning portion. It is desirable that the front convex portion 4 and the rear convex portion 5 are positioned diagonally on the head substrate 1.

FIG. 1(a) is an assembled view of the head 30, and the head 60 is assembled from the piezoelectric element 25, head cover 26, wiring 27, head substrate 1, diaphragm 2, and tank 3.

FIG. 2 is a perspective view of the gear ridge 11 of the present invention, in which the bearing A
12. Bearing B16. and anterior groove 14. Extraction groove 15. Lower groove 1
6 is formed. The groove width of the front groove 14 is such that the groove width of the front convex part 4 and the groove width of the removal groove 15 are such that the rear convex part 5 is inserted into the lower groove 16.
The width of the groove is such that a fixed spring 17 made of metal such as SVE can be inserted sufficiently.

FIG. 4 shows an inkjet jetting device in which all of the above-mentioned members are combined.

Front convex portion 4 of head substrate 1. The rear convex portion 5 is shaped like a part of a cylinder, and has a front groove 14. The head 50 is fitted into the removal groove 15 and fixed to the carriage 11 by the fixing spring 17. In other words, the previous song VA4. By fitting the rear surface portion 5 into the front groove 14 and the removal groove 15, respectively, displacement of the head 30 in the lateral direction is restricted. Next, the fixed spring 17 presses the head 30 toward the surface of the carriage 9 by sandwiching the center and rear sides of the head 30 with the front convex portion 4. The rear convex portions 5 each have a front groove 14. It touches the wall of the extraction groove 15 at one place, and the front convex part 4
A part of this corresponds to the D side of the carriage 11. That is, the head substrate 1 is held down and fixed in the vertical direction by the fixing springs so that it always contacts the carriage 17 at three points.

Since the inkjet head has problems such as nozzle clogging and ink drying, a nozzle cap and a nozzle cleaner are attached, and the nozzle cap is pressed in a direction perpendicular to the entire surface of the nozzle surface 6 when capping. At this time head 6
At 0, a force that tries to rotate in the counter-chronological direction is applied. The head substrate 1 is pressed against the carriage 11 by a fixed spring, and the front convex portion 4.degree. and the rear surface $5 of the head substrate 1 are respectively formed in the front groove 14. They hit the extraction groove 15 and are in a state where they do not move any further forward or backward, respectively. Therefore, the counterclockwise rotation caused by putting on the nozzle cap does not occur, and the position of the head 30 does not shift.

Also, a front convex portion 4 for positioning the nozzle 21 integrally on the head substrate 1 is provided. Since the f&convex portion 5 is formed, is it something for positioning? The connection between the nozzle and the nozzle is integrated, allowing extremely accurate positioning of the nozzle, and the head 30 can be easily stabilized and fixed in a fixed position.The head 30 can be attached to the carriage 11 with one touch without any fine adjustment. It's ringing.

Since the front convex portion 4 contacts the D surface of the carriage 11 at one place, a slight gap is formed between the head 50 and the D surface of the carriage 11, and the gap is smaller than the vent hole 24 of the tank 3 or the nozzle 21. The ink that has fallen onto the carriage 11 can easily fall onto the D surface of the carriage 11, and the ink that has fallen onto the carriage 11 can be easily collected from the carriage despite the arrangement of the absorbing member in the gap described above.

FIG. 5 shows a front convex portion 4 of a head substrate 1 according to another embodiment of the present invention.
is divided into a front upper convex part 4a and a front lower convex part 4b, and the front upper convex part 4
The portion a functions in the same manner as the portion protruding in front of the front convex portion 4 described above. The lower front convex part 4b functions in the same way as the part that protrudes below the front convex part 4, and creates a gap between the D surface of the carriage 11 and the head 30, which makes it easier to manufacture the head substrate 1 and the carriage 11. By pressing the head 50fD in the direction of the surface with the fixing spring 17 through a slight gap due to the tolerance, the head substrate 1 and the carriage 11 are brought into contact at three points, and a stable fixed state is achieved. By dividing the front convex portion 4 into two in this way, the head 30 and the gear ridge 11 can be separated.
This increases the degree of freedom in setting the gap T between the carriage 11 and the carriage 11, making it easier to dispose of ink that has fallen onto the carriage 11.

Further, as shown in FIG. 6, the lower rear convex portion 5a is formed on the head substrate 1 to be slightly smaller than the rear convex portion 5.

The rear lower convex portion 5a serves as a guide for fitting the rear convex portion 5 into the rear bay 15 when the head 30-i is mounted on the carriage, and at the same time serves to prevent the head 30 from shifting laterally with respect to the carriage 11.

If the distance between the nozzle and the paper is too short, the rear convex portion 5
By removing a certain amount of the entire surface, the distance between the nozzle and the paper can be increased, and by removing the front convex portion 4 by a certain amount, the distance between the nozzle and the paper can be reduced.

The head substrate 1 is made by plastic injection molding or the like, and almost the same one is made for each lot. As mentioned above, even if there is a discrepancy in the nozzle-paper distance setting,
At the stage when the head 30 is completely loosened, create the front and rear convex parts.
Within a lot, the nozzle-to-paper distance can be fully set without having to adjust it when it is mounted on the carriage 11.

FIG. 7 shows another embodiment of the present invention. A nozzle 21 is attached to the head substrate 1. Pressure chamber 22. The ink supply path 25 is formed in a groove shape, and positioning holes 8a, 8 are formed as positioning portions.
b' (i7, for example, 8a is a round hole shape, 8b is an oblong hole shape and is integrally formed on the head board, and this positioning hole 8
Positioning bins 9 are placed on the carriage 11 corresponding to a and 8b.
a, 9 b, f are formed integrally as shown in Figure 8.

The positioning bins 9a and 9b are shaped like a saw trapezoid, and the head 3
0, the carriage 11 can also be inserted by pushing it into the corresponding position of the positioning holes 8a and 8bi.
and the head 30 is fixed. Depending on the case, a fixed spring 17 or the like may be used as described above. In this case as well, since the nozzle 21 and the positioning holes aa and 8b are integrally formed on the head substrate 1, the positioning can be performed with high precision and the configuration is simple.

As shown in FIG. 9, in order to fix the head 60 to the carriage 11, a rubber ring 18 or the like may be used instead of the fixing spring 170. By using the ring-attached rubber 19 as shown in FIG. 10(b) and attaching a member for fixing the ring to the head 30, it can be easily fixed in a similar manner. Since the ink shed head can be made almost entirely of plastic or the like, it is much lighter than a wire head or the like, and can be fixed with an elastic member such as the fixing spring 17 or the rubber ring 18.

<Effects of the Present Invention> As described above, according to the present invention, the head 60 can be fixed to the carriage 11 with a single operation without the need for fine adjustment, and can be easily removed. head 30
are head board 1, diaphragm 2, tank 3. Piezoelectric element 25
．． It is assembled by a head cover 26°, wiring 27, a nozzle 21°, a pressure chamber 22. Since the ink flow path system such as the ink supply 26 and the positioning shape for determining the position of the head 30 are integrally formed on the head substrate 1, the position of the wire bottle can be adjusted completely by combining several combinations like a wire tod head. Nozzle 2 with extremely good accuracy compared to
1 position can be determined, and since it is manufactured in one piece, there is no need to worry about accuracy when assembling, and manufacturing accuracy is high and it can be easily manufactured. In addition, the head 30 and carriage 11 are not restricted by a surface to fix them, but by three specific points. The position of the three points can be determined easily and forcefully set to a stable state using an elastic member such as the fixing spring 17, and it is better to determine the position of three points than the case where surface accuracy is required. It is easy to make, and it is also easy to achieve positional accuracy.

In addition, when a slight gap is created between the carriage 9 surface and the head 30, the ink that leaks from the nozzle 21 or the ventilation hole 24 falls onto the carriage 9 surface, and then the ink that falls further is also handled. can be easily done.

1. When putting on the nozzle cap or cleaning the nozzle surface 6 with a nozzle cleaner, force is applied to the nozzle surface B, but this force does not cause the head 60 to move.

[Brief explanation of drawings]

FIG. 1(a) is a perspective view of a head constituting an embodiment of the inkjet jetting device of the present invention, and FIG.
A perspective view of a head substrate, which is a part of the head shown in FIG.
Fig. 2 is a perspective view of a carriage constituting an embodiment of the Infusiera+ll irradiation device of the present invention, Fig. 6 is a perspective view of a fixing spring, and Fig. 4 is a perspective view of the fixing spring shown in Fig. 1(a). FIG. 3 is a perspective view of an inkjet ejecting apparatus according to an embodiment of the present invention assembled with a head, a carriage shown in FIG. 2, and a fixing spring shown in FIG. 3; Moreover, FIGS. 5, 6, and 7 are of the present invention, respectively. A perspective view of a head substrate constituting another embodiment, FIG.
FIG. 7 is a perspective view of a carriage according to an embodiment corresponding to the head substrate, FIG. 9 is a perspective view of an inkjet jetting device according to another embodiment of the present invention, and FIGS.
) is a perspective view of a rubber ring and a rubber with a ring on the elastic part side constituting the embodiment. 1...Head, 4g! 2... Vibration plate 3... Tank 4... Front music vA 4a... Front upper convex portion 4'b.
...Anterior lower convex part 5... Rear convex part 5a... Rear lower convex part 6
... Nozzle surface 7 ... Tank receiver 11 ... Carriage 14 ... Front groove 15 ... Extraction groove 16 ... Bottom groove
17...Fixing spring 18...Rubber ring 19...Rubber with ring 21...Nozzle and above Applicant Epson Corporation Agent Patent Attorney Mogami (α) Figure 1, 3V! J Figure 4 Figure 5) b Figure 6 Figure 7 Figure 10

Claims (1)

[Claims] All of the nozzles, pressure chambers, ink supply channels, etc. are formed as grooves on the bed substrate, and the head substrate is constituted by an inkjet head having a positioning part and a carriage having a positioning part on which the inkjet head is mounted. All features: F-ink jet injection device.