JPS63316227A - Writing tool for image forming device - Google Patents

Abstract

PURPOSE:To attain the writing of addition and correction to an image formed on a recording medium by impressing the voltage to form an electric field shifting a magnetizing toner to a recording medium surface to the electrode part at the tip of a writing tool. CONSTITUTION:For a recording medium 5 which has a dielectric layer on the surface and consists of a conductive layer to which a rear surface is grounded, the operation such as the writing or correction of a toner image is executed with a writing tool 15 onto the surface. The writing tool 15 is equipped with a pen-shaped outer frame member 24, a magnetic electrode 22, and a built-in magnet 21, and the electrode 22 is connected to a recording control part 13 of the device, and an electrode part, to which a prescribed voltage is impressed, is formed. When the tip of the writing tool is inserted into a toner container 30, the toner is magnetized along the line of magnetic force of the magnet 21 to the electrode 22. A magnetized toner 23 is shifted to the surface of the medium 5 by the action of an electric field from the electrode part, and the writing, etc., to the medium 5 are executed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a writing instrument for an image forming apparatus, and in detail,
In an image forming apparatus such as a printer or a display device that applies a voltage between a recording electrode and a recording medium to cause toner, which is an image forming particle, to adhere to the surface of the recording medium, an image formed on the recording medium is arbitrarily applied. This relates to a writing instrument that can be added to and corrected.

(Prior Art) Conventionally, as an image forming method using the above-mentioned recording electrode and recording medium, there is a method known, for example, from Japanese Patent Publication No. 51-46707. As shown in FIG. 5, by rotating a rotating magnet 2 housed in a non-magnetic cylinder 3, 1s2 of conductive magnetic toner is sent onto the non-magnetic cylinder 3. The conductive magnetic toner 1 is caused to pass over a recording electrode 4 made of a magnetic material. Then, a voltage is applied between the recording electrode 4 and the conductive layer 7 on the inner side of the recording medium 5, which is disposed opposite to the recording electrode 4 and has a dielectric layer 6 as a surface layer, so that the toner on the recording electrode 4 is is attached to a recording medium in eight lines to form an image on the recording medium.

As an advanced form of such an image forming apparatus,
A display device shown in FIG. 4 using the above recording electrode has been proposed.

FIG. 4 shows the overall configuration of this display device, in which the 4-rich magnetic toner 1 in the toner container 10 is conveyed to the surface of the non-magnetic cylinder 3, guided onto the recording electrode 4, A part of the trajectory of the belt-shaped recording medium 5 rotated by the recording medium support member 11.11, which is a roller, is
A recording control unit 13 facing the recording electrode 4 and connected to the recording electrode 4 turns on and off the application of voltage to the recording electrode 4 in accordance with a signal from an input device 14 such as an image scanner. Note that the recording medium 5
is similar to the structure shown in FIG. 5 above, having a structure including a conductive layer located on the outer surface side of the rotating orbit and a conductive layer inside the conductive layer.

The function of such a structure is similar to that of the device shown in FIG. 5 above, and in the example shown in FIG. A cleaning device consisting of a cleaning member 8, a cleaning member electrode 8', and a magnet 9 is disposed to face a part of the trajectory of the recording medium.

In a display device having such a configuration, toner is applied to the recording medium 5 in response to the application of a signal voltage to the recording electrode 4.
The operation of moving upward and adhering or not adhering is repeated to form a predetermined image.

To give a specific example, for example, when a signal voltage of +40 V is applied from the human-powered device 14 and the recording control unit 13, the toner adheres to the recording medium 5, and does not adhere to the recording medium 5 during the Ov period. An image is formed.

(Problems to be Solved by the Invention) By the way, when an image is formed on the recording medium 5 in the above-described display device, for example, only the image of the document read by an image scanner and converted into a digital signal is recorded. Therefore, when additional writing or correction writing is to be performed on the recording medium, it is necessary to perform the additional writing or correction writing on the manuscript and then read the manuscript again using the input device. There was operational complexity.

Furthermore, when used as a display device, if an image displayed on the surface of the recording medium, for example in the display area, is written or erased directly with water-based ink, the water-based ink Water or alcohol content contained in such materials may remain on the recording medium and cause toner adhesion, and when performing the image forming operation again,
There is a problem in that toner adheres to unnecessary areas.

(Means for Solving the Problems) The present invention has been made to solve the above-mentioned conventional problems, and its purpose is to eliminate the conventional drawbacks and to solve the problems when used as a display device. Another object of the present invention is to provide a writing instrument for an image forming apparatus that can write additions or corrections on an image formed on a recording medium of the image forming apparatus.

(Summary of the Invention) The writing instrument for an image forming apparatus according to the present invention, which has been made to achieve the above object, is characterized by a writing instrument having a conductive layer on the surface and a grounded back surface. This writing instrument is used to write toner images on the surface of a medium, and this writing instrument has a writing instrument body with a built-in magnet, and is assembled to the tip of the writing instrument body, and the magnetic field of the magnet acts on the writing instrument. and an N-pole section made of a magnetic material provided so that toner having magnetism can be magnetized, and the electrode section is provided with a conductive layer of the recording medium to transfer the magnetized toner to the recording medium. 1 for forming an electric field to be transferred to the surface
The configuration is such that pressure is applied.

(Example of the invention) The present invention will be described below based on embodiments shown in the drawings.

FIG. 1 is a diagram showing the relationship between a writing instrument according to the present invention and an image forming apparatus (hereinafter referred to as a display apparatus) as a display apparatus to which the writing instrument is applied. This is the same as that explained in FIG.

That is, the belt-shaped recording medium 5 having the dielectric layer on the surface and the conductive layer on the inner surface is supported by endless magnetic force by a pair of recording medium support members 11, 11, which are rollers, and rotates (not shown). The rotational drive is performed intermittently at predetermined timings by a dynamic drive device.

Then, the recording medium 5 is placed close to a part of the rotational trajectory of the recording medium 5 (in this example, the lower end of the rotational trajectory of the recording medium arranged so as to be able to rotate in the vertical direction), and is used for recording images. A non-magnetic cylinder 3 having an electrode 4 is arranged, and a rotating magnet (not shown) installed inside the non-magnetic cylinder converts the non-magnetic conductive toner (hereinafter abbreviated as toner) in the toner container into the non-magnetic one. It is conveyed along the surface of the cylinder 30 and reaches the recording electrode 4.

The recording electrode 4 in the above structure is configured by arranging a large number of recording electrodes in a row in the width direction of the belt-shaped recording medium 5,
For each of these many recording electrodes, a recording control unit 1
3. Furthermore, an input device 14 such as an image scanner is connected, and by turning on and off voltage application in synchronization with the rotation of the recording medium, the toner is applied to the recording medium 5 only in necessary parts, and the toner image is formed as a whole. It will be formed on the recording medium 5.

In addition, a cleaning member consisting of a magnet 9 and a cleaning member electrode 8' is arranged in a part of the rotational path of the recording medium 5 to face the toner image formed on the recording medium 5 in the vicinity of the illustrated position. On the other hand, it is provided to function to remove this toner from the recording medium.

The display device configured as described above is housed inside the main body frame 12, which is a case, and uses an opening provided in the front surface of the display device as a display section to display images formed on a recording medium. ing.

Reference numeral 15 denotes a writing instrument according to the present invention, and in this example, the operator can hold it in his hand and perform operations such as writing or correcting any image on the manual through the opening of the display section of the display device on the surface of the recording medium 5. It has become so.

This writing instrument will be explained in detail.

This writing instrument 15, as shown in FIG. A magnetic electrode 22 is attached to protrude from the tip, and an outer frame member 2 is connected to the magnetic electrode 22.
The magnetic electrode 22 is connected to the recording control section 13 as shown in FIG. As shown, the voltage applied to the recording electrode 4 is approximately equal to 20 to 60
v) is applied to form an electrode section.

The tip of such a pen-shaped writing instrument 15 is shown in FIG. 3(a).
When the writing instrument is inserted into the toner container 30 shown in , the toner is magnetized along the lines of magnetic force of the magnet 21 on the magnetic electrode 22 having a protruding pen-like tip. Note that this toner container 30 is
The tip of the writing instrument is inserted through the central opening of a flexible sheet (for example, silicone rubber, urethane rubber, or other synthetic resin material) 31 provided at the top of the box 32 while rubbing against the sheet, and can be pulled out. Therefore, when the writing instrument is removed from the toner container 30, the toner adhering to the part other than the tip of the pen-shaped writing instrument is rubbed by the flexible sheet as shown in FIG. 3(b). The toner is strongly attached to the magnetic electrode 22 due to the magnetic force, and the toner is magnetized only at the tip (see FIG. 2(a)).

The writing instrument may be inserted into the toner container 30 when the toner at the tip is consumed by writing, which will be described later.

Next, a case in which an image is written on the surface of a recording medium displayed on the display unit using the writing instrument having the above configuration will be described.

Now, when the display section of the display device has a size of A-1, and alphanumeric characters, for example, about 15 mm x 15 mm in size are to be written on it using the writing instrument 15 explained in FIG. 2 (a) above, Considering that, the resistance value of the 8 conductive layers on the surface side that constitutes the recording medium 5 is 108 to 1014 Ω-cm.
Then, by writing one character on the recording medium 5 by touching the tip of the writing instrument 15 to which a voltage of 20 to 60 V is applied to the surface of the recording medium,
1-1.5 mg of toner is consumed. Here, if the writing instrument 15 is made to magnetize a maximum of about 20 to SOB toner at its tip with magnetic force, the magnetic type 8i22
It is possible to write about 10 to 50 characters on the recording medium 5 using the writing instrument 15, depending on the magnitude of the voltage applied to the writing instrument 15.

After the toner at the tip of the writing instrument 15 is consumed, by inserting the writing instrument 15 into the toner container 30 shown in FIG. 3, the toner can be magnetized again for writing.

In the above-described configuration, in order to make it possible to write a toner image on the surface of the recording medium 5 with a writing instrument, the resistance value of the electrical layer of the recording medium 5 must be set to 105 to 10'6 Ω-CrQ.
, preferably 10 8 to 10 14 Ω-CIll, and it is necessary that the back surface of this insulating layer is formed of a layer of a conductive material that is grounded.

When the resistance value of the insulating layer is 105Ω-cm or more,
This may cause problems such as blurring of the image or generation of heat due to too much current flowing from the electrode of the writing instrument to the recording medium.Also, if this resistance value is 1016 Ω-cm or more, toner may adhere to the recording medium. This is because it is difficult to do so, leading to problems such as not being able to form an image.

Further, the magnitude of the voltage applied to the magnetic electrode 22 of the writing instrument 15 is usually equal to the voltage applied to the recording electrode of the main body of the display device. That is, a voltage of about 2α to 60V is applied.

In the example shown in FIG. 2(b), a needle electrode 12 made of a magnetic material is used.
2 is attached to the tip of a pen-shaped writing instrument, and the magnetic force of the magnet 21 built into the outer frame member 24 is applied to this weight i 122 to concentrate the magnetic field at the tip. A voltage of 40 V is applied to form an electrode portion.

In order to prevent damage to the recording medium 5 due to contact with the needle electrode 122, the needle electrode 122 forming the electrode portion is
Damage prevention portions 25 made of an elastic material such as felt are provided on both sides of 2.
has been established.

The writing instrument shown in FIG. 2(b) can also be used to perform predetermined writing on the recording medium 5 in the same manner as the example shown in FIG. 2(a).

In the examples shown in FIGS. 2(C) and 2(d), a toner storage portion is provided inside the outer frame member 24 so as to surround the needle electrode 122! Fig. 2(c) shows an example in which 23 is provided.
The example shown in FIG.
This figure shows a system in which a battery 26 is built in and a voltage is applied to the needle electrode 122. In these examples, when the toner that is magnetized along the lines of magnetic force at the tip of the needle electrode is consumed, the tip of the writing instrument is turned downward to allow the toner in the toner container 123 to fall. For example, the toner falls and is magnetized again along the lines of magnetic force at the tip of the needle electrode 122.
It becomes possible to write again. Therefore, in this example, there is an effect that the operation of inserting the toner into the toner container 30 is not necessary, and in particular, in the example shown in FIG. It also has the advantage of being convenient to use.

(Effects of the Invention) As explained above, the writing instrument according to the present invention enables arbitrary additional writing and correction writing of toner images on a recording medium having a charge retention layer. The advantage is that the operability is significantly improved compared to the conventional operation that required writing again after correcting the original in order to correct the image, and the written image is transferred to the recording medium using toner. Since the toner image is the same as the toner image formed by a known image forming apparatus, there is also the advantage that there is no problem in erasing the formed image and forming the next toner image.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view showing an outline of the configuration of a display device, which is an image forming device to which a writing instrument according to the present invention is applied, and FIGS. 2(a), (b), and (c). 3(d) is an explanatory diagram showing an outline of the construction of an embodiment of the writing instrument according to the present invention, and FIGS. 3(a) and 3(b) are diagrams illustrating the outline of the construction of a toner container used with the writing implement. FIG. 4 is a vertical cross-sectional view showing an outline of the configuration of a display device, which is a conventional image forming apparatus, and FIG. 5 is a diagram for explaining the fundamental configuration of the conventional image forming apparatus. 1: Toner 2: Magnet 3: Non-magnetic cylinder 4: Recording electrode 5: Recording member 6: Dielectric layer 7: Conductive layer 8: Cleaning member 8': Cleaning electrode 9: I+fi stone 10: Toner container 11: Recording medium support member 12: Body frame 13: Recording control unit 14: Human power device 15: Writing pen 21: Magnet 2
2: Magnetic electrode 23: Toner adhering to the tip electrode portion 24: Writing instrument frame 25: Damage prevention member 26: Electrode 30: Toner container for writing on the tip 31; Flexible sheet 32; Toner container frame 122:
Needle electrode 123: l-Chi storage part Fig. 1 Fig. 2 (d) Fig. 2 (b) Fig. 2 (G) Fig. 2 υ. Fig. 4 1 Toner 2 Magnet 3 Non-magnetic 4 Raw circle (4 Recording container 5 Suzuja material 6 04 7 Conductive layer 1-

Claims (1)

[Claims] A writing instrument for writing a toner image on the surface of a recording medium made of a conductive layer having a dielectric layer on the surface and a grounded back surface. an electrode section made of a magnetic material that is assembled to the tip of the writing instrument body and is provided with magnetic toner that can be magnetized by the action of the magnetic field of the magnet; A writing implement for an image forming apparatus, wherein a voltage is applied between the conductive layer and the conductive layer to form an electric field for transferring the magnetized toner to the surface of the recording medium.