JPS5814773A - Electrostatic recording head - Google Patents

Abstract

PURPOSE:To improve reliability and stability by burying and holding one end of an electrode wire, the other end thereof functions as a recording electrode, to an electrode wire terminal holding while presupposing the grouping of the recording electrode without forming an electrode aggregate. CONSTITUTION:One ends of the electrode wires 505 are buried into a square bar-shaped electrode holder 503 consisting of an insulating material such as epoxy resin, and the recording electrodes 501 are formed as the sections are exposed at regular pitches in a row along one surfaces in the longitudinal direction in order to contact with a recording medium while the other ends of the electrode wires 505 are buried into the electrode wire terminal holder 517 composed of the same insulating material as the electrode holder 503 at the same pitch as the recording electrodes 501. The electrode wires 505 among the electrode holder 503 and the electrode wire terminal holder 517 are each connected electrically at every electrode wire at the predetermined positions of a printed wiring substrate 507.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrostatic recording device, and more particularly to the structure of a multi-stylus electrostatic recording head suitable for recording image signals in facsimiles, printers, etc.

Conventionally, various multi-stylus type electrostatic recording heads that electronically perform scanning distribution of image signals to be recorded have been put into practical use.

The electrostatic recording head used for facsimile is a multi-stylus type in which a large number of recording electrodes, each corresponding to each pixel corresponding to one recording scanning line, are arranged in a line in an insulating material such as an epoxy resin mold. Image signals are electronically scanned and distributed by the action of auxiliary electrodes placed on the front or back surface of the recording medium that is used and in close contact with the recording medium.

Figure 1 shows an example of a so-called same-plane control type electrostatic recording head in which recording electrodes and auxiliary electrodes are arranged on the same surface side with respect to the recording medium.
Each electrode holder (103) is made of an insulating material such as epoxy resin at a density of several or more electrodes and is embedded independently in a line with the tips thereof exposed. (102) is an auxiliary electrode, and the recording electrode (101) is divided into groups of the same number, and the electrode holder (103) is placed close to each group on both sides and on the same surface. buried or exposed. The auxiliary electrode (102) is the recording electrode (
101), it is also called a control electrode because it has the function of controlling the recording position. In electrostatic recording, the recording voltage is divided into approximately two parts and applied to the recording electrode (101) and the control electrode (102), and both voltages are applied simultaneously to the electrostatic recording paper (104).
) Recording is performed only at the position.

Next, the recording mechanism will be explained with reference to FIG. 2, which shows the electrode configuration of the same-plane control type electrostatic recording head. Second
In the figure, a number of recording electrodes (201) are each connected to m
The recording electrodes in the same relative position in every other electrode group are connected to each other to form two systems of GA and QB electrode groups. The recording electrode (201) is arranged so as to correspond from the center of the control electrode (202) to the center of the adjacent control. Here, when the total number of recording electrodes and control electrodes is N and M, respectively, M
There is a relationship: = N / m + 1.

Recording is performed simultaneously for each group of m recording electrodes (201), and the control electrode (202) is used to select the electrode group for recording. To explain specifically, in FIG. 2, f is the first electrode group G-1.
When performing LD recording, depending on the pattern to be recorded in the system GA of the recording electrode group, high voltage pulses such as 1300V and 0V, which alone do not create an electrostatic latent image, may be applied.
At the same time, a voltage of opposite polarity, for example +300, whose absolute value is approximately equal, is applied to the control i to 1 and 2 of the systems GO of the pole (202). With this, electrode group G
-6 between the recording electrode of 1 and the electrostatic recording paper (not shown)
A potential difference of 00 V or 300 V is generated, and an electrostatic latent image is created on the surface of the electrostatic recording paper directly under the recording electrode where a potential difference of 600 V is generated. Next, recording electrode group G-2 is recorded by driving system Qn of the recording electrode group and applying voltage to the second and third control electrodes. Below G
While driving the control electrodes alternately, the control electrodes are shifted one by one and voltage is applied to two control electrodes at the same time, thereby scanning and recording one line.

Dividing the recording electrode groups into two systems and driving them alternately in this way, and driving the two control electrodes simultaneously is as follows:
This is done to prevent the potential distribution of the electrostatic recording paper (304) from decreasing at the end of the control electrode (302) as shown by the broken line in FIG. However, the potential distribution becomes almost flat as shown by the solid line, making it possible to create an electrostatic latent image that is uniform in the scanning direction. In addition, as shown in FIG. 1, a control electrode (102
) are arranged close to both sides of the recording electrode (101). Similarly, electrostatic recording paper (
104) to flatten the potential distribution, and the control electrodes on both sides of the recording electrode are commonly connected to the control electrodes facing each other.

Next, in FIG. 4 showing a conventional example of the structure of an electrostatic recording head having the electrode configuration shown in FIG.
5) is an electrode wire constituting the recording electrode shown in FIG. 1 and FIG.
It is a nickel wire with a rating of 0.1. One end is attached to a pole holder (
403) and are uniformly exposed along the longitudinal direction to constitute a recording electrode (401). The electrode wires (405) are divided into electrode groups each consisting of m wires corresponding to the recording electrodes (40], ), and the electrode wires having the same relative position in every other electrode group are commonly connected. te2
In number of electrode line sets (406) are formed. This electrode line set (406) corresponds to the recording electrode group systems GA and GB in FIG. (not shown) to supply high voltage pulses in accordance with the image signal to be recorded.

On the other hand, similarly to the recording electrode (401), the electrode holder (403)
), one end of which is close to both sides of the recording electrode (401), and two rows of rectangular control electrodes (402) arranged on the same plane are connected to the printed circuit board (402) via lead wires (409). 407), and the control electrodes facing each other with the recording electrode array sandwiched therebetween are commonly connected by through-hole connection. And the plug part of the printed circuit board (407) (
408) to a control electrode drive circuit (not shown), and a high voltage pulse of opposite polarity to that of the recording electrode is supplied to control the recording position.

Although not shown, the electrode holder (403) and the printed circuit board (407) are fixed by a housing, and together constitute an electrostatic recording head unit.

The conventional electrostatic recording head described above has a problem in that the wiring of recording electrodes, that is, electrode lines, is extremely complicated. That is, the electrode wire (
After grouping the electrode wires (405), it is necessary to distinguish between those having the same relative position and form an electrode wire set (406), but it is difficult to accurately classify the positions and order of a very large number of thin electrode wires. This is extremely difficult, and it is not easy to connect the electrode wires included when wiring an electrode wire set all at once. In any case, it requires a great deal of skill to manufacture, and inspection and correction of incorrect wiring after work is extremely difficult.

Furthermore, the electrode wires (405) intersect in a fairly complicated manner in the process of forming a pure electrode assembly (406), and the tlL polar wires come into contact with each other many times, and even though they are insulated, a relatively high voltage is applied. Because of this, there is a risk of dielectric breakdown, and a risk of breakage due to shock or vibration, which poses problems in stability and reliability.

On the other hand, recording electrodes are formed by photoetching on a copper-clad laminate, and wiring for a matrix circuit is formed by grouping a large number of recording electrodes and interconnecting them in the same relative position to form an electrode assembly. There is an example in which an electrostatic recording head is constructed using a printed circuit board. This method requires an extremely sophisticated technique to accurately form a large number of recording electrodes with a fairly high density, and also has the disadvantage that the yield rate during production is not very good and therefore the cost is high. Furthermore, since the recording electrodes are formed by etching a copper-clad laminate, the cross-sectional area relative to the pitch is smaller than that of the recording electrodes made of conventional wire electrodes, and the shape is irregular (trapezoidal). ), which also has the drawback of poor recording quality and density when used in a device such as a facsimile.

The present invention has been made in view of the above points, and its object is to provide an electrostatic recording head with a novel configuration that is easy to manufacture. Another object is to provide an electrostatic recording head with improved reliability and stability. Still another object is to provide an electrostatic recording head that does not require sophisticated printed circuit board manufacturing technology and has excellent recording quality.

The electrostatic recording head according to the present invention does not require classification of electrode wires for grouping recording electrodes, and is based on the premise that recording electrodes are grouped without forming electrode sets. It is special that the other end of the wire is buried and held in the electrode wire end holder, and one embodiment will be described in detail below with reference to the drawings.

FIG. 5 shows the structure of an electrostatic recording head according to an embodiment of the present invention having the electrode configuration shown in FIG. In the figure, (505) is an electrode wire of -0.04 to 0.1 m+a
It consists of a copper, nickel or phosphor bronze wire (determined by the arrangement density of the recording electrodes) coated with an insulating coating, such as a resin such as formal, polyurethane or polyester, to a uniform thickness of 5 to 20 microns. Electrode wire (
One end of the electrode holder (505) is embedded in a rectangular bar-shaped electrode holder (503) made of an insulating material such as epoxy resin, and is arranged at a predetermined pitch (0.06~ 0.2U) to expose the cross section and attach the recording electrode (5
01), while the other end of the electrode wire (505) is connected to a recording electrode (501) on an electrode wire end holder (517) made of the same or similar insulating material as the electrode holder (503), as will be described in detail later. ) and is completely buried with no exposed parts.

The electrode holder (503) and the electrode wire end holder (517)
), the electrode wires (505) extend at a pitch equal to the arrangement pitch of the recording electrodes, as shown in FIG. electrically connected.

The printed wiring board (507) is used to realize the configuration of recording electrodes of the electrostatic recording head in FIG. 2. That is, the recording electrodes (501) are divided into a large number of 'electrode groups' each consisting of m electrodes, and electrode groups having the same relative position in every other electrode group are interconnected to form two systems of GA and GB electrode groups. The wiring to be formed is, for example, formed by photo-etching a copper-clad laminate.

FIG. 6, which shows only this printed wiring board (507), will be described in more detail.

In FIG. 6, (611) is a land for electrically connecting the electrode wires, and is arranged in a staggered manner at a constant pitch so as to correspond to each recording electrode, that is, the electrode wire, and to facilitate division into groups. A predetermined number, for example, twice the number m of recording electrodes in an electrode group, that is, 2 m, are arranged in a column in a direction parallel to the arrangement direction of the recording electrodes (50). 1ΣT connected land (611) of these electrode wires
) is a conductor (6
12). These conductors (6
The set obtained by step 12) is connected to the recording electrode drive circuit as described above, and is supplied with a high voltage pulse corresponding to the image signal to be recorded. Alternatively, the conductor (612) is electrically connected to the conductor (614) on the back side of the board by a null hole (613) provided in a part of the conductor (612), and these conductors (614)
) leads to a plug (608) for connection to a recording electrode drive circuit (not shown). In addition, this printed wiring board (607) has a structure for controlling the recording position of the recording electrode.
Control electrode (502) embedded in the electrode holder (503) in FIG. 5 and exposed on the same plane as the recording electrode.
It has a land (615) for connecting a lead wire (509) connected to the terminal and a conductor (616) for guiding the land to the plug (608).

In addition, in FIG. 6, there is shown a printed wiring board (607) that integrates the MA-IJ circuit part for grouping the recording electrodes and the connecting land and plug part for connecting the control terminals. As mentioned above, these (1) have separate configurations, for example, the 5 matrix circuit part is a flexible printed circuit board, the other is a rigid printed circuit board, and the two are integrated by bonding and electrical connection is made. FIG. 7 shows an example of an electrostatic recording head in that case, and FIG. 8 shows an example of a flexible substrate.

In FIG. 8, (807) is a flexible printed circuit board made of polyester, polyimide or glass epoxy laminate with a thickness of 25 to 125 jams, excluding terminals (815), lands (811), conductors ( 812)
, (814), etc., is the same as that of the printed wiring board (607) in FIG.

In addition, by reducing the dimensions of the printed circuit board in the direction of the electrode lines,
In order to construct a smaller electrostatic recording head, a circuit configuration as shown in FIG. 9 may be used in which the number of unit rows of electrode line connecting lands is equal to the number of recording electrodes in one electrode group, that is, m.・.

In the figure, the electrode wire connecting lands (911) have a circuit configuration in which every other column is commonly connected by a conductor (912). Terminals (815) and (915)
are used for electrical connection with the rigid printed circuit board (710) having connection lands and plugs for the control electrode wiring, and are arranged in the same number and at opposite positions. It has shaped terminals, and electrical continuity is achieved by contacting each other or bonding with a conductive adhesive, or by soldering. The purpose of using a flexible printed circuit board in this way is to facilitate manufacturing, which will be explained next.

FIG. 10 is a diagram showing an example of an apparatus for manufacturing the electrostatic recording head shown in FIG. 7.

(1010) has a thread groove (101
1) is a metal column or cylinder (hereinafter referred to as a wire-wound drum) with a diameter of about 100 mm, and a slightly deep straight groove is formed on the outer periphery along the longitudinal direction so as to cross the threaded groove (1011). A groove (1012) and a shallow straight groove (1013) are formed separated by about 180°. The winding drum (1010) has shafts at both ends and is driven to rotate in the direction of the arrow by a power source (not shown). (1020) is a small-diameter metal cylinder (hereinafter referred to as a guide screw) with thread grooves (1021) formed on the circumferential surface at the same pitch as the winding drum (1010). ) is rotated in the direction of the arrow at the same speed. (1031) and (1032) are wire guides used to guide the electrode wire (1040), and are supported so as to be rotatable. (1050) is an insulating film removing device that removes the insulating film from a predetermined portion and a predetermined length of the electrode wire while running it. An example is shown in FIG. 11. Fig. 11 shows a device that removes the insulating film by burning it out using a micro-torch, where (1101) is a micro-flame that emits a mixed gas of oxygen and hydrogen spouted from a nozzle (1102) with a micro-inner diameter. Obtained by combustion. (1103) is a small diameter pipe that guides the mixed gas, and is rotatably supported by the operating lever (1105) provided on the rotating lever (1104).
106) and is fixed to the bush (1107). The rotating lever (1104) has a one-turn clutch (1108) and a pulley (1109) on the same axis, and is intermittently rotationally driven by a power source (not shown). Also, one side of the pipe (1103) is a bottle (111).
0), which is fitted into a sliding bushing (1112) fixedly attached to a swinging lever (1111) that is rotatably supported on the shaft.
It is slidably supported, and a rubber tube (1113) is connected to it, and a mixed gas of oxygen and hydrogen is supplied from an oxygen and hydrogen gas generator (not shown).

Next, an insulating film removing device (10
The operation of step 50) will be explained with reference to FIG.

Before starting the insulation film removal operation, the flame (1101) is at the lowest point of its motion trajectory (1114), as shown in the figure.
The electrode wire (1115) whose insulating film is to be removed is running in the direction of the arrow at a predetermined speed while maintaining a predetermined angle θ smaller than 90° with the flame motion trajectory (1114). The pulley (1109) is rotated by being powered by a belt or chain from a power source (not shown). However, at a predetermined timing, the one-turn clutch (1108)
When triggered and connected, the single rotation lever (1104) rotates once. At this time, the lower end of the tube (1103) does not slide inside the sliding bush (1112), and the lower end of the tube (1103) slides inside the swing lever (1111).
), the upper end portion performs a substantially elliptical motion together with the operating lever (1106) and bushing (1107). Therefore, the flame (1
101) moves in the direction of the arrow along a nearly elliptical locus shown as (1114). The upper part is a nearly straight line that crosses the electrode wire (1115) at an angle of 00, and the insulating film is burned off and removed. The velocity of the flame and the angle O between the electrode wire and the electrode wire are appropriately selected so that the electrode wire itself does not melt and the insulating film is removed over a predetermined length.

Returning to FIG. 10, (1060) is a tension control mechanism for the electrode wire, which brakes the rotation of a drum around which the electrode wire is wound several times with a constant torque using a hysteresis brake or the like. Contributes to correct alignment on the winding drum (1010). Note that this tension control mechanism (1060
), the insulation film removing device (1050), and the two wire guides (1030) are rotated in synchronization with the rotation of the winding drum (1010) by rotating the feed screw (1070) by a power source (not shown). Winding drum (10
10) is placed on a table (1080) supported so as to be movable in a direction parallel to the longitudinal direction.

(1033), (1034), and (1035) are wire guides used for guiding the continuous electrode wire (1040), such as changing direction, and are rotatably supported. (1036) is rotatably supported by a buffer lever (1038) which is swingably supported by a buffer roll with the bottle (1037) as a fulcrum, and the continuous electrode wire (1040) is supported by a tension spring (1039). ) Adjust the tension applied to the (1090) is a wire spool which is rotatably supported and continuously supplies the electrode wire (1040).

Next, a procedure for manufacturing the electrostatic recording head shown in FIG. 7 using the apparatus shown in FIG. 10 whose structure has been explained above will be described.

First, prior to arranging the electrode wires, the control electrode row that is to form one row of the two rows of control electrodes that are arranged sandwiching the recording electrode (701) shown in FIG. 7 is placed directly on the winding drum (1010). In addition to attaching it to the groove (1012),
In the figure, the electrode wire connection land (s 1 ),
A flexible printed circuit board (911) coated with a conductive adhesive, such as an epoxy resin containing a filler that is slightly fluid at room temperature, to a predetermined thickness by any means such as screen printing is attached to a predetermined portion of the winding drum (1010). The winding is fixed at the position.

As shown in FIG. 12, the control electrode array consists of a prismatic section (1211) with a cross section of predetermined dimensions, a thin equilinear section (1212) connected to the prismatic section, and a small flat section (1213) for connecting lead wires. control electrode unit) (12
10) is manufactured by, for example, a cold heading method using brass wire or phosphor bronze wire, and a predetermined number of these are bonded or bonded to a flat plate (1220) at one end surface of the prismatic portion so as to be equal to the arrangement pitch of the control electrodes. Constructed by gluing.

After casting with epoxy resin, which will be described later, the broken line portion is cut and separated as a control electrode.

Now, the electrode 13 (1040) is the wire spool (10
90), and the wire guide (1035), (1
034), buffer roll (1036), wire guide (1
033), and then the tension control mechanism (1060), insulation film removal device (1050) and wire guide (1031)
.

(1032) and one end is fixed near the thread groove (1011) of the winding drum (1010) via the guide screw (1020). In this state, the winding drum (1010) and the guide screw (1020) are rotated at the same speed in the direction of the arrow, and the table is moved in synchronization with this. The insulation film removing device (1050) removes the connecting land (81) of the flexible printed circuit board every time the winding drum (1010) rotates.
1), the operation is timed so that the portion of the electrode wire (1040) from which the insulation film has been removed comes into contact with (911). In this way, the electrode wire (1040) to which a constant tension is applied by the tension control mechanism (1060) has its insulation film removed from a predetermined position, is guided by the guide screw (1020), and is guided into the thread groove (1011) of the winding drum (1010). ). During this winding process, the electrode wire (104
0) are each connected to a flexible printed circuit board, and this situation will be simply explained based on FIG. 13.

In FIG. 13, (1307) indicates a part of the flexible printed circuit board, and (1305).

(1311) and (1312) are respectively an electrode wire, a land for connecting the electrode wire, and a conductor for wiring the land to the IJ. The winding drum (1010
) The electrode wires (1305) wound around the electrode wires (1305) are lined up at a pitch p equal to the arrangement of the recording electrodes as described above, and are connected to the regularly arranged electrode wire connection lands (1311) of the flexible printed circuit board (1307). It's crossed. At this time, the electrode wire (1305) is
50), the insulating film is removed at one location each so as to coincide with the electrode wire connection land, as shown in the figure.

That is, the first electrode wire has the insulation film removed corresponding to the land ■, and the second electrode wire has the insulation film removed in the direction of the electrode wire by a distance q from the insulation film removed part of the polar wire. The insulating film is removed after separation, which is the same < c+
It corresponds to the land ■ separated by the distance. These lands are arranged in a staggered manner so that the electrode lines to be connected are always located in the center, so that they are shifted by a distance p equal to the arrangement pitch of the recording electrodes. These connecting lands (1311
) is coated with a conductive adhesive in advance, and the electrode wire from which the insulating film has been removed ensures continuity after being heated and hardened, and is also mechanically firmly fixed. At this time, the insulating film of the conductive 1L adhesive was removed * fn M!
The heat-curing ridge machine 4iQ also contacts several adjacent electrode wires.
However, since they have an insulating film, electrical insulation is maintained.

The head of the electrostatic recording head in Fig. 7; record t11:4m: (7
In order to configure all of 01), wind/W+! When fI work is completed, Makisho drum (1010) and tape sword (108
0) and the operation of the insulating film removing device (1,050) will stop, so cut the electrode HN(1oso)y and fix the rear end on the winding drum 4). After that, the winding drum (10
10) was removed from the apparatus ffi: of Fig. 10, and a casting mold having bamboo of 8゛i length was installed opposite the deep straight groove (1012) and the shallow straight groove (1013). , In the deep straight Y1♂10 part, the electrode holder ("
'703), and in the straight groove part, evogis tree J]' was used to form a 1L polar wire termination holder (717).
Pour in i7. In addition, at this time, a deep straight groove (1013)
In the casting mold opposite to this, a row of control electrodes as shown in FIG. It is used by being pre-installed in a predetermined position.

After casting, the wire-wound drum (1010) is heated in a furnace at a predetermined temperature for a predetermined time to harden the electrode wire and control electrode, and the wire is coated on the electrode wire connection land of the flexible printed circuit board. The conductive adhesive also hardens to fix the electrode wires, and electrical connections are made with the corresponding electrode wires. After that, unnecessary portions of the electrode wire are cut off, the casting mold and the winding drum are removed, and the electrode holder (703) and the electrode wire end holder (717) are machined to a predetermined size. Finish it. The electrode wire end holder (717) is then coated with an insulating material such as resin on the surface where the cross section of the electrode wire is exposed to completely insulate and bury the end of the electrode wire opposite the recording electrode. The flexible printed circuit board (707) on which the electrode wires (705) constituting the recording electrodes (701) are fixed also has lands for connecting lead wires of the control electrodes (702) and drive circuits (not shown) for each electrode. It is integrated with a rigid printed circuit board (710) having a plug part (708) used for this purpose by soldering or bonding with a conductive adhesive. After that, a lead wire (709) is passed between the flat part of the control electrode (Fig. 12, 1213) and a rigid printed circuit board (710), and a soldered connection is made to make a static '[] as shown in Fig. 7. l
Obtain a U recording head. Although not shown, this includes an electrode holder (703) and a rigid printed circuit board (710).
It is fixed with metal fittings and covered with a cover, and then incorporated into an electrostatic recording device such as a facsimile machine.

The embodiments of the present invention that have already become clear are improved in several respects compared to the conventional examples and produce new effects.

During the manufacturing process of the electrostatic recording head, the electrode wires that make up the recording electrodes are arranged in an orderly manner at a predetermined pitch, and electrical connections, matrix wiring, and mechanical fixing are automatically performed.
A large part of the work that previously had to be done manually has been replaced by machines, making it possible to significantly save labor, eliminate incorrect wiring, and make inspection after work easier. In addition, the electrode wires are all aligned and fixed to the board, and their ends are fixed to the electrode wire end holder, so they do not intersect in a complicated manner as in the conventional example, and therefore there is less risk of dielectric breakdown. In addition, it has the advantage that it is less likely to break due to vibration or impact, and thus an electrostatic recording head with excellent reliability and stability can be provided. Furthermore, if the electrode wire termination holder is formed, it can be used as it is to terminate many electrode wires, and there is an advantage that this termination treatment can be performed extremely easily. Furthermore, compared to conventional electrostatic recording heads that use a printed circuit board in which recording electrodes and matrix circuits are collectively formed on a copper-clad laminate using the photo-etching method, the present invention does not require sophisticated manufacturing technology and is easy to manufacture. In addition to being less expensive, since the recording electrode has a circular cross-sectional shape of a certain size, it is particularly advantageous in terms of recording quality and density.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a same-plane control type electrostatic recording head;
Figure 2 is an electrode configuration diagram of the same-plane control type electrostatic recording head, Figure 3 is a diagram showing the potential distribution of the electrostatic recording paper at the end of the control electrode, and Figure 4 is a diagram showing the same-plane control type electrostatic recording head. FIG. 5 is a diagram showing a conventional example of the structure of a recording head, FIG. 5 is a diagram showing an embodiment of the electrostatic NFi recording head of the present invention, and FIG. 6 is a diagram showing a printed wiring board used in the embodiment. , FIG. 7 is a diagram showing another embodiment of the electrostatic recording head of the present invention, FIG. 8 is a diagram showing a flexible printed circuit board used in the other embodiment, and FIG. 9 is a diagram showing a flexible printed circuit board used in the other embodiment. 10 is a diagram showing an embodiment of the electrostatic recording head manufacturing apparatus of the present invention; FIG. 11 is a diagram illustrating an embodiment of the electrode wire insulation film removal apparatus; FIG. 12 is a diagram showing another example. 13 is a perspective view showing an embodiment of the control electrode used in the electrostatic recording head of the present invention, and FIG. 13 is an enlarged detail of a flexible printed circuit board illustrating the connection of electrode wires in the electrostatic recording head of the present invention. It is a diagram. 101.201,401,501,701 --- Recording electrode, 102,202,302°402.502,70
2,1210...control electrode, 103,403,50
3,703...electrode holder, 104,304...
- Electrostatic recording paper, 405.505.705.1040. 1115.1305... Electrode wire, 407°507.
607,710・φ・・Rigid printed circuit board, 707
, 807, 907, 1307... Flexible printed circuit board, 611゜811.911, 1311... Land for fist electrode wire connection, 717... Electrode wire termination holder, 1010... Tube winding drum , 1050... Insulating film removal device, 1060... Tension control mechanism, 109
0... Electrode wire spool.

Claims (1)

[Claims] A recording electrode holder comprising one end of the electrode wire integrally molded with resin and one end surface of the electrode wire exposed as a recording electrode, and a recording electrode holder comprising one end of the electrode wire integrally molded with resin and the other end surface of the electrode wire exposed as a recording electrode. a buried electrode wire end holder; an electrode wire connection land located between the recording electrode holder and the electrode wire end holder and corresponding to the electrode wire; and a group of recording electrodes. a printed circuit board on which a conductor is formed to commonly connect electrode wire connection lands having the same relative position of corresponding recording electrodes in each group when divided into a plurality of groups, and the electrode wire is connected to the printed circuit board. An electrostatic recording head characterized by being electrically connected to a corresponding electrode wire connection land of a substrate.