JPH0330953A - Ink jet type printing head apparatus - Google Patents

Abstract

PURPOSE:To simplify the replacement of a perforated film by providing a film cassette having the perforated film provided thereto under tension on a vibration frame in a freely detachable manner. CONSTITUTION:A perforated film 3 fixed at one end thereof by the first pin 15 and having a large number of perforations 3a is provided on the opening part 12 of a film cassette 13 and the other end of the perforated film 3 is pulled by the tensile spring 17 engaged with the second pin 16 provided to the film cassette 13 to set the perforated film 3 under tension. When the film cassette 13 and a vibration frame 10 are integrally provided, the perforated film 3 becomes a state provided on the heating dot 2 provided to the upper surface of a thermal head 1 under tension and printing paper 6 is positioned above the perforated film 3. The ink 5 supplied from an ink supply part 4 collects between the perforated film 3 and the upper surface of the thermal head 1 to be supplied to the perforations 3a of the film 3. When a drive pulse is applied to the heating dot 2, bubbles are generated in the ink received in the perforations 3a and the ink 5 is injected to the outside to perform printing to the printing paper 6.

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to an inkjet print head device, and particularly to a novel improvement for making the perforated film easily replaceable.

b. Prior art There are various inkjet print head devices that use this type of perforated film that have been used in the past, but a representative one is described in Japanese Patent Application Laid-Open No. 60-7126.
No. 0, U.S. Patent No. 4.608.577, Patent Application No. 1983-
The configurations shown in FIGS. 6 and 7 disclosed in No. 114900 can be disclosed.

That is, in the case of FIG. 6, what is indicated by the symbol l is a thermal head having heat generating dots 2, and the upper surface of this thermal head l has a plurality of holes 3a in contact with the heat generating dots 2. A film 3 is provided stretched in the direction of arrow A, and this perforated film 3 itself is configured to reciprocate in the direction of arrow C.

Ink 5 is supplied from a pair of ink supply pipes 4 between the upper surface of the thermal head l and the perforated film 3.
is held, and this ink 5 is configured to enter into each hole 3a.

Furthermore, a printing paper 6 is disposed above the perforated film 3, and by supplying a predetermined driving pulse to the heat generating dot 2, bubbles due to heat generation are generated in the holes 3a, and the bubbles are The ink 5 is transferred to the printing paper 6 by pressure.
is ejected and printing is performed.

Further, in the configuration shown in FIG. 7, a part of the perforated film 3 is configured in an endless shape, and is immersed in the tank 7 of the ink 5 to supply the ink 5 into the holes 3a. 6th
The same parts as those in the figures are given the same reference numerals, and their explanations are omitted.

C1 Problems to be Solved by the Invention Since the conventional configuration was configured as described above, the following problems existed.

That is, the perforated film used in these has a thickness of 0. It is an extremely thin film of O1-0, 05 mm, and the diameter of the pores is 10-100 μm, so it is easily deformed, and its handling requires extreme care and is inconvenient.

Therefore, it is necessary to replace the film at predetermined intervals, but
In the case of FIG. 6, it was difficult to easily replace the perforated film, and in the case of FIG. 7, since the perforated film was inside the tank, it was not easy to replace the perforated film.

The present invention has been made to solve the above problems,
In particular, it is an object of the present invention to provide an inkjet print head device in which a perforated film can be easily replaced.

61 Means for Solving the Problems An inkjet print head device according to the present invention includes a film cassette having a perforated film stretched over an opening, and a structure in which the film cassette is attached via a locking means so as to vibrate. The structure consists of a vibrating frame.

08 Effect In the inkjet print head device according to the present invention, the film cassette with the perforated film stretched thereon is removably installed on the vibrating frame. By removing the film from the vibrating frame and replacing it with a new film cassette, the perforated film can be replaced extremely easily, making it possible for anyone to replace the perforated film, which was the biggest drawback up until now. became.

f. Embodiments Hereinafter, preferred embodiments of the inkjet print head device according to the present invention will be described in detail with reference to the drawings.

Note that the same or equivalent parts as in the conventional example will be described using the same reference numerals.

1 to 5 illustrate an inkjet printhead device according to the present invention.

In FIG. 1, the reference numeral 1 indicates a thermal head having a plurality of heating donts 2, and this thermal head 1 is fixed to a main body (not shown).

At a position near the thermal head 1, a vibration frame 10 having a substantially U-shape and arranged so as to surround the upper part of the thermal head 1 is provided with vibration means (not shown) (for example,
A pair of magnets 11 are provided on the top surface of the end of the vibrating frame 10.

On this vibrating frame 10, a film cassette 13 having an almost plate-like overall shape and an opening 12 in the center is disposed.
is removably provided, and a pair of magnetic materials 14 provided on this film cassette 13 correspond to the magnet 11. Therefore, when the film cassette 13 is placed on the vibration frame IO, the magnet 11 and the magnetic material 14 It is fixed in a predetermined positional relationship by the magnetic action of.

The magnet 11 and the magnetic material 14 constitute a locking means for fixing the film cassette 13 on the vibrating frame 10.

Above the opening 12 of the film cassette 13, a perforated film 3 having the same structure as the conventional one and having a plurality of holes 3a and having one end fixed by a first bin 15 is provided, and the other end of this perforated film 3 is tensioned by a tension spring 17 that is engaged with a second pin 16 provided on the film cassette 13.

When the film cassette 13 and the vibrating frame 1O configured as described above are integrated, as shown in FIG.
This perforated film 3 is stretched over the heating dot 2 on the upper surface of the thermal head l, and this perforated film 3
Print paper 6 is located above.

Furthermore, at a position near the top surface of this thermal head 1,
A pair of ink supply sections 4 are provided, and this ink supply section 4
The ink 5 supplied from the film 3 accumulates between the perforated film 3 and the upper surface of the thermal head l, and the ink 5 is always supplied into the holes 3& of the film 3.

The inkjet thermal head device according to the present invention includes:
The structure is as described above, and by applying a driving pulse to the heat generating dot 2 in the state shown in FIG. A bubble is generated, and the ink 5 is ejected to the outside by the action of this bubble, and printing is performed on the printing paper 6.

Furthermore, the configuration shown in FIG.
3 configured for use with serial color printers.
Four perforated films 3 are provided on the four openings 12 in a configuration similar to that shown in FIG. 1, and a pair of magnetic materials 14 are formed at both ends.

The center line X in the longitudinal direction of each perforated film 3 is not perpendicular to the printing direction, but is arranged at an angle,
The vibration direction C of the vibration frame IO substantially coincides with the center line X.

Therefore, by arranging each thermal head in a direction perpendicular to the center line X, the printing resolution is improved.
By arranging it at an angle of 41 degrees, it is possible to print with a resolution of 400 DPI (approximately 16 dots/mm).

The configuration shown in FIG. 4 is another embodiment of the embodiment shown in FIG. The plate spring 20 and the engaging portion 21 constitute the locking means.

The configuration shown in FIG. 5 is for the case where the inkjet type print head device 30 shown in FIG. , a platen 41 for providing printing paper at an upper position;
is provided, and the other parts are the same as in Fig. 3.
The same reference numerals are given and explanations are omitted.

Note that the tensioning structure of the perforated film 3 and the detachable structure of the film cassette 13 and the vibration frame 1O in this example are merely examples, and other structures not disclosed in the example may be used. It goes without saying that similar effects can be obtained even if

g9 Effects of the Invention Since the inkjet print head device according to the present invention is configured as described above, when replacing the perforated film, only the film cassette needs to be replaced, and this can be done extremely easily. Therefore, it has the effect of making it possible to put into practical use an inkjet printer using this type of perforated film.

Furthermore, since the extremely thin perforated film, which is inconvenient to handle, is stretched over the replaceable film cassette, the cost of replacement parts is extremely low, and the burden on the user can be reduced.

Furthermore, automatic exchange of film cassettes with perforated films is also possible.

[Brief explanation of drawings]

1 to 5 show an inkjet print head device according to the present invention. FIG. 1 is an exploded perspective view showing the overall structure, FIG. 2 is a sectional view showing the overall structure, and FIG. 3 is a cross-sectional view showing the overall structure. FIGS. 4 and 5 are plan views showing other embodiments, FIGS. 4 and 5 are exploded perspective views showing other embodiments, and FIGS. 6 and 7 are configuration diagrams showing conventional grooves. ■ is a thermal head, 3 is a perforated film, 3a is a hole, 5
10 is an ink, 10 is a vibrating frame, 11 is a magnet, 12 is an opening, 13 is a film cassette, 14 is a magnetic material, 20 is a leaf spring, and 21 is an engaging portion. Figure 2 Figure 1

Claims (1)

[Claims] [1] Perforated film (3) having a plurality of holes (3a)
The ink (5) is supplied between the thermal head (1) and the perforated film (3) while vibrating in the surface direction of the perforated film (3) on the thermal head (1), and the ink (5) is supplied between the perforated film (3) and the perforated film. The ink (
5) in an inkjet print head device configured to perform printing by jetting a film, a film cassette (13) having the perforated film (3) stretched over an opening (12);
), a vibration frame (1) configured to attach the film cassette (13) via a locking means and vibrate
0), wherein the film cassette (13) is removably attached to the vibrating frame (10). [2] The locking means includes a magnet (11) and a magnetic material (14).
2. The inkjet print head device according to claim 1, wherein the inkjet print head device comprises: [3] The locking means includes a plate spring (20) and an engaging portion (2).
1) The inkjet print head device according to claim 1, characterized by comprising: 1). [4] Four perforated films (3) are provided for color printing, and the center line (X) in the longitudinal direction of each perforated film (3) is aligned with the film cassette (13) when printing. 4. The ink jet print head device according to claim 1, wherein the ink jet print head device is configured to be non-orthogonal to the printing direction (D) in which the print head moves.