JPS58134757A - Magnetic ink recorder - Google Patents

Abstract

PURPOSE:To obtain a magnetic ink recorder capable of preventing the concentration and drying of ink due to magnetic force and also of recording stable and high-quality pictures by providing a magnetic ink passage connecting a magnetic ink supply path with an ink recovery path between a cover part and a guide part. CONSTITUTION:In case where recording is restarted after a certain period of downtime, a cover part 33 is turned toward the direction of arrow A and the upper space of a fixed box 13 is closed. A magnetic ink 20 is blown out of a slit 14 by means of a pump 24 and directed to a passage formed on the inclined part 17 of a rising magnet 12 where both ends of a guide plate 36 ae touched by an auxiliary magnet 16 and the end 18 of the auxiliary magnet 16. By this, concentrated ink is pushed away and the inclined part 17 and the end face 18 are cleaned, a stylus part 11 is also cleaned, and the magnetic ink flow so working is recovered in the recovery path 38 and returned to a subtank 23.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention uses magnetic force to hold and raise magnetic ink on a recording needle made of a magnetic material, and applies a Coulomb force corresponding to both signals to the raised magnetic ink. , relates to an image recording device that records images by flying magnetic ink onto a recording surface.By preventing the magnetic ink from concentrating and drying due to magnetic force, it can maintain a stable image of good quality even after being left unused for a long time or stopped. An object of the present invention is to provide an image recording device that can record images.

A conventional magnetic ink recording device, as shown in FIG. By magnetizing the stylus 1 with the raised magnet 6, forming a bump of magnetic ink 2 on the stylus 1 by magnetic force, and applying an image signal voltage (applying Coulomb force) between the stylus 1 and the back electrode 3. The printer, which was configured to form an image on the recording surface 4, had the following drawbacks.

That is, as shown in FIGS. 2 to 4, the magnetic ink 2 is always in contact with the raised magnet 6 and the auxiliary magnet 6 and is subjected to the action of magnetic force. And magnetic concentration (magnetic field segregation) was occurring on the auxiliary magnet 6. For this reason, the flow of the magnetic ink 2 on the bump magnet 6 was inhibited, and it was not possible to stably supply the magnetic ink 2 as it was consumed. In addition, magnetic concentration and magnetic ink 2
When the viscosity of the magnetic ink 2 becomes high due to evaporation and drying, the magnetic ink 2 also has the disadvantage of not being able to fly even if a Coulomb force is applied between the stylus 1 and the surface electrode 3.・Cavity.

As mentioned above, in conventional image recording devices, when left unused, f
When recording after a long recording pause, the supply and flight of the magnetic ink was hindered, making it impossible to stably record high-quality images.

The present invention aims to improve such drawbacks and provide an image recording apparatus capable of stably recording high-quality images.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 6 shows a schematic configuration of a magnetic ink recording apparatus which is an embodiment of the present invention. In the figure, numeral 10 denotes a recording head section, and the recording head section 1o includes a stylus 11 made of a magnetic material arranged facing the recording surface 16, and a protruding magnet 12 provided in contact with the surface of the bistylus 11. and a fixed housing 13 for fixing the.

An auxiliary moving magnet 16 forming a slit portion 14 is provided at a position facing the uplift magnet 12.

Also, the above-mentioned uplift magnet 12 and auxiliary magnet 16.

The surfaces of the magnets except for the slope portion 1/7 and the end surface portion 18 are each covered with a shield plate 1d. Incidentally, the uplift magnet 12 and the auxiliary magnet 16 constitute a part of the storage chamber 21 for the magnetic ink 2o.

The magnetic ink supply pipe 22 supplies the magnetic ink 20i to the recording head unit 10, and one end thereof is connected to the magnetic ink storage chamber 21, and the other end is provided in a sub-tank 23 that stores the magnetic ink 2o. .

A pump 24 provided in the middle of the magnetic ink supply pipe 22 is driven by a pump driving means 25 to supply the magnetic ink 20.
is supplied from the sub-tank 23 to the ink storage chamber 21.

Magnetic ink 2o is sent to the sub tank 23 from a main tank (not shown) through a pump 26 and a pipe 27. The liquid level of the sub-tank 23 is always maintained at a constant level by a detection means 28 such as a Hall element and a pump 26 driven in response to a liquid level position detection signal.

The stylus 11 is connected to a driving means 29 that causes the magnetic ink 2o raised at the tip of the stylus to fly onto the recording surface 16 in response to an image signal. Also stylus 1
A bias voltage is applied between the back electrode 1 and the back electrode 3o by a power source 31. A fulcrum shaft 3 provided on the fixed cylinder 13
As shown in FIG. 6, the lid member 33, which rotates about 2, is made up of a housing 34, a guide member 36 whose both ends are supported by the housing 34 by plate springs 36, and a packing member 37.

Further, when the lid member 33 is rotated in the direction indicated by the arrow as shown in FIG. The lid member 33 and the guide member 36 are constructed in the same manner.

In the state shown in FIG. 6, the guide member 36 is configured to abut against the end surface 18 of the auxiliary magnet 16 and to form a flow path along the slope 17 of the uplift magnet 12. Further, at this time, the spacing of the space formed between the slope portion 17 of the uplifting magnet 12 and the surface portion of the stylus 11 and the guide member 36 is configured to be equal to or slightly narrower than the spacing between the slit portions 14.

The rotary solenoid 39 connects the lid member 33 with an arrow B
The coil spring 40 biases the lid member 33 in the direction indicated by the arrow.

Next, the operation of the apparatus according to the second embodiment will be explained.

First, when the lid member 33 is rotated in the direction of arrow B and the device is turned on, the driving means 26 is activated at the same time, and the time pump 24 is driven, and the magnetic ink 2o is drawn from the sub-tank 23 into the ink storage. It is sent to chamber 21 and filled. At this time, since the magnetic force of the uplift magnet 12 and the auxiliary magnet 16 is acting on the opening slit portion 14 of the ink storage chamber 21, the magnetic ink 2o in the pipe 22 reaches from the opening to the ink liquid level of the sub-tank 23. It is maintained without falling even when pressure equivalent to a head difference of . For this reason, the magnetic ink 2o is supplied between the styli 11 through the slope portion 17 of the bump magnet 12, forming a bump as shown in FIG.

With the protuberances formed as described above, the driving means 29 moves the stylus 11. ．． When a voltage is applied between the stylus 11 and the rear type 4iii30 in accordance with the image signal, the stylus 11
The magnetic ink 2o flies from the tip of the recording surface 16 due to Coulomb force and forms an image on the recording surface 16. Incidentally, as the magnetic ink 2o is consumed, it is automatically supplied onto the stylus 11 through the pipe 22 by magnetic force.

When recording has finished and you want to pause for a certain period of time and start recording again,
To start recording, the rotary solenoid 39 is once driven to rotate the lid member 33 in the direction of the arrow mark to seal the upper space of the fixed housing 13. The pump 24 is driven by a pump driving means 26 in a sealed state, and the magnetic ink 20 is forcefully blown out from the opening slit 14. At this time, both ends of the guide plate 36 provided on the lid member 33 are brought into contact with the auxiliary magnet by the plate spring 35, and the flow of the magnetic ink 20 is directed between the slope portion 17 of the uplift magnet 12 and the end surface 17 of the auxiliary magnet 16. The concentrated ink is swept away, and the oblique surface 17 and the end surface 1=tl'' are washed up by the rapidly flowing magnetic ink flow. Further, the above-mentioned magnetic flux also cleans the stylus section 11 following the slope, and is then collected in the collection path 38 and returned to the sub-tank 23.

After driving the pump 24 for a defined period of time, the pump 24 is stopped and the lid member 33 is rotated in the direction of arrow B. At this time, the uplift magnet 12, the auxiliary magnet 16 and the stylus 11
Since the magnetic ink 20 without magnetic concentration is supplied above to form a bulge, a Coulomb force is applied between the back electrode 3o and the stylus 11, and the supply is not inhibited, making it possible to perform stable recording.

As described above, according to the present invention, the area near the tip of the recording stylus, the bump magnet, and the auxiliary magnet that are generated due to the power action of the bump magnet and the auxiliary magnet, evaporation and drying of magnetic ink, etc. during recording stoppage and when left unused. A magnetic ink recording device that can consistently record high-quality images by constantly forming ridges with unconcentrated magnetic ink because the concentrated ink on the top is washed away with a flow of unconcentrated magnetic ink. can be provided.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram of the head section of a conventional magnetic ink recording device, Fig. 2 is a schematic sectional view of the same recording device, Fig. 3 is a partially enlarged view of the same head section, and Fig. 4 is a schematic diagram of the head section of the same recording device. A perspective view, FIG. 5 is a diagram of a magnetic ink recording device which is an embodiment of the present invention,
FIG. 6 is an external view of the device. 1.11... Stylus, 2.20...
・Magnetic ink, 3.30...Back electrode, 4.1
5... Recording surface, 5.12... Raised magnet, 6, 16... Auxiliary magnet, 7...
, 10... recording head section, 13...
...Fixed housing, 14...Slit part, 17...
...Slope part, 18... End face part, 19...
...Shield plate, 21...Storage chamber, 22...
...Magnetic ink supply pipe, 23...Sub tank, 24.26...Pump, 25...
... Pump drive means, 21 ... Pipe, 28.
...Detection means, 29...Driving means, 31
...Power supply, 32...Fulcrum shaft, 33...
... Lid member, 34 ... Housing, 36 ...
...Plate spring, 36...Guide member, 37...
...Packing member, 38...Ink recovery path,
39...Rotary solenoid, 40...
...Coil spring. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 21! 1 13 Figure 5 Figure 6 Figure 23? 2

Claims (1)

[Claims] (1) a recording needle made of a magnetic material, a bump magnet provided on the recording needle, a magnetic ink supply path having an opening near the bump magnet, and arranged in parallel with the magnetic ink supply path;
a recovery path having an opening near the bump magnet; a lid member that seals a space including at least the recording needle, the opening of the magnetic ink supply path, and the opening of the recovery device; and a lid member provided on the lid member; a guide member that forms a space from at least the opening of the magnetic ink supply path along the surfaces of the uplift magnet and the recording stylus substantially parallel to each other at a predetermined interval; A magnetic ink recording device characterized in that a magnetic ink flow path connecting the magnetic ink supply path and the recovery path is configured with the guide member. @) Claim 1, characterized in that the distance between the guide member, the bumping magnet, and the surface of the recording needle is equal to or slightly narrower than the distance between the openings of the ink supply path.
The magnetic ink recording device described in .