JPS5820460A - Manufacture of electrostatic recording head and electrode wire insulation film remover - Google Patents

Abstract

PURPOSE:To facilitate the manufacture of a highly reliable head by automatically performing electric connection, matrix interconnection and mechanical fixing of electrode wires as recording electrode arranging them in neat order in the head production process. CONSTITUTION:One train of control electrodes from recording electrodes is mounted into a straight groove 1012 on a winding drum and a flexible print substrate 807 is wound on the winding drum 1010. An electrode wire 1040 is guided with a guide thread 1020 via a tension control mechanism 1060 and an insulation film remover 1050 and wound on a substrate connection land 811 in contact with a portion to be removed of the film and fastened with a condutive adhesive previously coated on the connection land. Thereafter, an injection mold is set in straight groove 1012 and 1013 for running an epoxy resin thereinto and after it is hardened, the injection mold and the winding drum are removed. This electrode unit is integrated with a rigid printed board by soldering or the like while a necessary lead wire is provided thereacross. In this manner, an electrostatic recording head is obtained. This enables significant saving energy while eliminating errorneous connection of wiring.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrostatic recording device, and more particularly to a method and apparatus for manufacturing a multi-stylus type electrostatic recording head suitable for recording image signals in 1 mm facsimile machines and printers.

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 densely layered on the recording medium.

FIG. 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, where (101) is the recording electrode and l m
Each electrode holder (103) is made of an insulating material such as epoxy resin at a density of several electrodes per m or more, and is embedded independently in a line with the tips thereof exposed. (102) is an auxiliary electrode, which divides the recording electrodes (101) into groups of the same number and attaches them to the electrode holder (103) so that they are close to each other 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 having the same relative position in every other electrode group are connected to each other to form two groups of electrodes G and G, and each electrode The recording electrodes (201) of the group are 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 of N/m+1.

Recording is performed simultaneously for each group of recording electrodes (201), and the control electrode (202) is used to select the electrode group for recording. To be more specific, in FIG. 2, when recording is performed using the first electrode group G-1, depending on the pattern to be recorded in the system GA of the recording electrode group, it is necessary to set a pattern at a height that does not create an electrostatic latent image by itself. Voltage pulses of, for example, -300V and 0V are applied, and a voltage of opposite polarity, for example, +3, whose absolute value is approximately equal, is applied to 1 and 2 of the systems Qo of the control electrode (202).
Apply 00V.

As a result, a potential difference of 600 µ or 300 V is generated between the recording electrode of electrode group G-1 and the electrostatic recording paper (not shown), and the surface of the electrostatic recording paper directly under the recording electrode where the potential difference of 600 µ is generated is An electrostatic latent image is created. Next, the system QB of the recording electrode group is driven, and a voltage is applied to the second and third control electrodes, and the electrode group G
, -2 are recorded. Thereafter, while driving Gm and Qn alternately, the control electrodes are shifted one by one and voltage is applied to two control electrodes at the same time to perform scanning recording of 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, the electrostatic recording paper (1
04) is for flattening the potential distribution, and the control electrodes on both sides of the recording electrode should be connected in common to those facing each other.

Next, in FIG. 4, which shows a conventional example of the structure of an electrostatic recording head having a ridge configuration, the electrostatic recording head shown in FIG.
5) is an electrode wire constituting the recording voltage shown in FIGS. 1 and 2, for example, a φ0.04
~0. llnm Nilaglu line. And one end is a square rod-shaped J made of a head material i゛1 such as epoxy resin.
The recording electrode (401) is inserted into the f4r electrode holder (403) and exposed uniformly along the length direction.
The Ichi 4-year line (405) corresponds to the recording electrode (401), and is divided into electrode groups each consisting of m wires, and electrode wires with the same relative position are shared in every other electrode group. 2m 'electrode wire set (4'Q
6) Form. This electrode line set (406) corresponds to the recording electrode group system (iA and (3B) in FIG. Recording electrode 1 drive circuit (
(not shown), and a high voltage pulse corresponding to the image signal to be recorded is supplied.

On the other hand, similarly to the recording electrode (401'), the electrode holder (401')
03) Two rows of control electrodes (402) each having a rectangular shape and having one end close to both sides of the recording electrode (401) and arranged in the same plane are printed through each lead gland (409)'. Wired on the front and back of the board (407) and recorded by through-hole connection? Lt (Iti control voltages 4j facing each other with the i needle row in between are connected in common. Then, the control 11ε pole drive circuit (not shown) is connected via the connectors (4, 08) of the printed circuit board (107). (2), and a high 'rL pressure pulse of opposite polarity to that of the recording electrode is supplied to control the recording position.

Although not shown in the drawings, the electrode holder (403) and the substrate ('40'7) are fixed by a casing, 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 differentiate between those with the same relative position <1" to 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. It is extremely difficult to do this, and it is also not easy to connect the electrode wires included when wiring an electrode wire set all at once. Inspection and correction of incorrect wiring are also extremely difficult.

Furthermore, the electrode wires ('405) intersect in a fairly complicated manner during the process of forming the electrode wire set (406), and the electrode 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. However, in order to accurately form a large number of recording electrodes with a fairly high arrangement density, a very advanced technique is required, and the manufacturing yield is not very good (therefore, the cost is high). Furthermore, since the recording electrode is formed by photo-etching a copper-clad laminate, its shape is smaller and irregular (trapezoidal) than the conventional recording electrode made of wire electrodes, making it difficult to assemble into devices such as facsimile machines. There is also the drawback that when used in a crowded manner, both recording quality and density are inferior.

The present invention has been made in view of the above points, and its object is to provide a method for manufacturing an electrostatic recording head with a novel configuration that is easy to manufacture, and an apparatus used for carrying out the method. . Another object is to provide a method and apparatus for manufacturing an electrostatic recording head with improved reliability and stability.

Still another object is to provide a method and apparatus for manufacturing an electrostatic recording head that does not require sophisticated printed circuit board manufacturing technology and has excellent recording quality.

The new electrostatic recording head is characterized in that it does not require classification of electrode wires for grouping recording electrodes, and groups recording electrodes without forming electrode wire sets.
An example will be described in detail below with reference to the drawings.

FIG. 5 is a diagram showing the structure of a novel electrostatic recording head having the electrode configuration in FIG. 2.

In the figure, (505) is an electrode wire of -0.04 to 0.1 m.
Copper, nickel or phosphor bronze wire with a diameter of 5 to 5 m (determined by the arrangement density of the recording electrodes) is coated with an insulating coating such as formal, polyurethane or polyester (5 to 1 vertical halo).
Consisting of a 20μ uniform thickness coating. One end of the electrode set (505) is embedded in a rectangular rod-shaped electrode holder (503) made of an insulating material such as epoxy resin, and is arranged at a predetermined pitch (0 , 06 to 0.2 myn) to form a recording electrode (501). One electrode wire (5
As will be described in detail later, the other end of the electrode holder (5)
At the same pitch as the recording electrode (501), the electrode wire end holder (517) is made of the same or similar insulating material as 03).
It is completely buried with no exposed parts. The electrode wires (505) between the electrode holder (503) and the electrode wire end holder (517) extend at a pitch equal to the arrangement pitch of the recording electrodes, as shown in FIG. Each electrode wire is electrically connected to a predetermined position on the wiring board (507).

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 the 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 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 of recording electrodes (for example, twice the number m of recording electrodes in an electrode group, ie, 2n) are arranged in a column unit in a direction parallel to the arrangement direction of the recording electrodes (501). The connection lands (611) of these electrode wires are
Recording electrodes having the same relative position in every other recording electrode group described above are wired together by means of common wiring (conductors (612)).The set obtained by these conductors (612) is The electrode line connecting land (611) is connected to the recording electrode drive circuit as shown in FIG.
) or a part of the conductor (612) through the through hole (613) to connect the conductor (61) on the back side of the board.
4), and these conductors (614) reach a plug (608) for connection to a recording electrode drive circuit (not shown). In addition, this printed wiring board (6
In order to control the recording position of the recording electrode, lead wire (07) is connected to the control electrode (502) which is embedded in the electrode holder (503) in FIG. 5 and exposed on the same plane as the recording electrode. Land (615) for connecting wire (509)
) and a conductor (616) for guiding it to the plug (608).
).

In addition, in FIG. 6, a printed wiring board (607) is described in which the matrix circuit part for grouping the recording electrodes and the connecting land and plug part for wiring the control electrodes are integrated. These may be configured separately, for example, the matrix circuit portion may be a flexible printed circuit board, the other may be a rigid printed circuit board, and the two may be integrated by bonding to establish an electrical connection. FIG. 7 shows an example of an electrostatic recording head in this case, and FIG. 8 shows an example of the 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 μm, and terminals (
815), land (811), conductor (812),
The circuit configuration consisting of (814) and the like is the same as that of the 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 connection lands (911) have a circuit configuration in which every other column is commonly connected by a conductor (9i2). Terminals (81,5) and (91
5) is used for electrical connection with the rigid printed circuit board (710) having connection lands and plugs for the control electrode wiring, and the same number of plugs are provided at opposing positions. They have terminals of the same shape, and electrical continuity is achieved by contacting them with each other, joining them with a conductive adhesive, or joining them by soldering. The purpose of using a flexible printed circuit board in this way is to facilitate manufacturing, which will be explained next.

FIG. 1O is a diagram showing an example of an apparatus for manufacturing the electrostatic recording head shown in FIG. 7. (1010) is a metallic cylinder or cylinder (hereinafter referred to as "metallic cylinder") with a diameter of about 100 mm, in which thread grooves (1011) are formed on the circumferential surface at the same pitch as the arrangement pitch of the recording electrodes, for example, at a pitch of 0.125 mm. , is called a winding drum), and on its outer periphery, there are approximately 18 slightly deep straight grooves (1012) and shallow straight grooves (1013) along the longitudinal direction of the thread (1011).
They are formed separated by 0°. The winding drum (1010) has shafts at both ends (15), 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 (
A wire guide 1032) is used to guide the electrode wire (1040) and is rotatably supported.

Reference numeral 1050 is an insulating film removing device that removes the insulating film from a predetermined portion and length of the electrode wire while running it. An example is shown in FIG. 11. Fig. 11 shows a device that removes the insulation film by burning it out using a small torch, in which (1101) is a small flame, and a mixed gas of oxygen and hydrogen is ejected from a nozzle (1102) with a small inner diameter. Obtained by burning.

(1103) is a small diameter pipe that guides the mixed gas and is rotatably supported by the operating lever (1106) in the bottle (1 (16) 105) provided on the rotary lever (1104).
) and is fixed to the bush (1107). The rotating lever (1104) has a one-way (one rotation) clutch (1108) and a pulley (1109) coaxially,
It is designed to be rotated intermittently by a power source (not shown). In other words, goo! J-(1109) is constantly rotated by a power source (not shown). Usually, the armature (, 1, 1) of the electromagnetic solenoid (1116)
17) is in a position where the tip thereof is inserted into a hole provided in the clutch (1108), and this clutch is in a disengaged state.

When this electromagnetic solenoid (1116) is temporarily driven to disengage the armature (1117), the clutch is engaged for only one rotation, and the rotation lever (1104) is
Rotate. Also, one side of the tube (1103) is connected to a pin (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 attached 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 (11, 14), as shown in the figure.
The electrode wire (1,115) from which the insulation film is to be removed is run in the direction of the arrow at a predetermined speed while maintaining a predetermined angle θ smaller than 9°0° with respect to the flame motion trajectory (1t 1.4 ). There is. 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 electromagnetic lenoid (1
When the one-turn clutch (1108) is connected by controlling the drive of the motor (116), the rotating wheel (-(1104)) rotates once.

At this time, the lower end of the pipe (1103) is connected to the sliding bush,
112), but swings laterally together with the swing lever (1111), so the upper end part does not slide inside the operating lever (111).
06), performs an almost elliptical motion together with the bush (1107). Therefore, the flame (1101) coming out from the nozzle (1102)
) moves in the direction of the arrow along a nearly elliptical trajectory shown as (1114). The upper part is a straight line, and the electrode wire (
1115) at an angle O, and burn off the insulating film to remove it. The moving speed of the flame and the angle θ between the flame 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
) and the insulation film removing device [(1050) and the two wire guides (1030) rotate the winding drum (1010) (19) by rotating the feed screw (1070) by a power source (not shown). A table (108) is supported so as to be movable in a direction parallel to the longitudinal direction of the winding drum (1010).
0) It is placed on top.

(103'3), (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 (1036) is , 40).

(1090) is a wire spool which is rotatably supported and continuously supplies the electrode wire (1040).

Next, a description will be given of how to manufacture the electrostatic recording head shown in FIG. 7 using the apparatus shown in FIG. 10, the configuration of which has been explained above.

First, prior to arranging the electrode wires, a control electrode row (20) to form one row of control electrodes to be arranged sandwiching the recording electrode (701) shown in FIG. 7 is placed on a winding drum (1010). ) in the straight groove (1012), and in FIG. A flexible printed circuit board coated with an epoxy resin containing epoxy resin to a predetermined thickness by any means such as screen printing is wound and fixed at a predetermined position on the winding drum (10).The control electrode row is the 12th control electrode row. As shown in the figure, a control electrode unit (1210) consists of a prismatic section (1211) with a cross section of predetermined dimensions, a thin conductive wire section (1212) connected thereto, and a small flat section (1213) for connecting the lead wires.
) is manufactured by, for example, a cold heading method using brass wire or phosphor bronze wire, and a predetermined number of wires are bonded or glued 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. It is composed of This was done by epoxy resin casting, which will be described later, and the broken line part was cut and separated as a control electrode.

Now, the electrode wire (1040) is connected to the wire spool (1090
, ), and the wire guides (1035), (10
34), buffer roll (1036), wire guide (40
33), and then a tension control mechanism (1060), an insulation film removal device (1050), and a 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 (101,, O
) and guide screws (1, 0, 20) at the same speed in the direction of the arrow, and move the table in synchronization with this. The insulation film removing device (1050) removes the electrode wire (1040) from the connecting land (s 11 ), (911) of the flexible printed circuit board every rotation of the winding drum (1010).
) is timed so that the parts from which the insulation film has been removed come into contact with each other. Thus, the tension control mechanism (106,0)
The electrode wire (1040), to which a constant tension is applied, has its insulating film removed from a predetermined position, is guided by a guide screw (1020,), and is threaded into a thread groove (1011) of a winding drum (1010).
). During this winding process, all of the electrode wires ('1040) constituting the recording electrode are connected to the flexible printed circuit board, and this process will be explained in detail with reference to 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
050), the insulating film was removed from each of the electrode wire connection lands one by one as shown in the figure. Therefore, (23) the first electrode wire has the insulation film removed corresponding to the land ■, and the second electrode wire has the distance q from the insulation film removed part of the first electrode wire in the direction of the electrode wire. The insulating film is removed at a distance of q, which corresponds to land 0, which is also separated by q. 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. As mentioned earlier, these connection lands (13] 1) are coated with a conductive adhesive in advance, and the electrode wires from which the insulating film has been removed ensure continuity after being heated and hardened, as well as being mechanically stable. Firmly fixed. At this time, the conductive adhesive also comes into contact with several electrode wires adjacent to the electrode wire from which the insulating film has been removed, and is mechanically fixed after being heated and cured. physical insulation is maintained.

Inspecting the recording of the electrostatic recording head in Fig. 7, the winding drum (
1010), the table (1080), and the operation of the insulation film removing device (1050) are stopped, so electrode # (1040) is cut and its rear end is fixed on the winding drum. After that, the winding drum (1,010) was removed from the device shown in Fig. 10, and a deep straight groove (1,0) was formed.
2) and the shallow straight groove (1013), install a casting mold having grooves of respective depths, and place the electrode holder (703) shown in Fig. 7 in the deep straight groove part. In the groove portions, epoxy resin is filled with MCI to form electrode wire terminal end holders (71, 7), respectively. N: At t6, at this time, on the casting mold facing the deep straight groove (1013), a control electrode array as shown in FIG. Similarly, it is used pre-installed in place to form the other row of control electrodes.

After casting, the winding drum (101O) is heated in a furnace at a predetermined temperature for a predetermined time to harden, and the electrode wire and control electrode are integrated, and the conductive wire coated on the electrode wire connection land of the flexible printed circuit board is cured. The adhesive also hardens to fix the electrode wires, and electrical connections are made with the corresponding electrode wires. After that, the unnecessary part of the electrode wire is cut off, the casting mold and the winding drum are removed, and then the electrode holder (
703) and the electrode wire end holder (717) are patterned and finished to predetermined dimensions. 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 (70B) 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 perform electrostatic recording as shown in Fig. 7. Get the head. Although this is not shown, the electrode holder (
703) and a rigid printed circuit board (710) are fixed with metal fittings and covered with a cover, and used by being incorporated into an electrostatic recording device such as a facsimile.

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.

The electrode wires that make up the recording electrodes are arranged in an orderly manner at a predetermined pitch during the manufacturing process of the electrostatic recording head, and electrical connections, IJ wiring, and fixed patterns are automatically performed, which previously had to be done manually. A large part of the equipment was replaced by machines, which enabled significant labor savings, eliminated incorrect wiring, and made inspection after work easier. In addition, the electrode wires are aligned and completely fixed, and do not intersect in a complicated manner as in conventional examples, which reduces the risk of dielectric breakdown and is less likely to break due to vibration or impact. This has the advantage (27) that an electrostatic recording head with excellent reliability and stability can be provided. Furthermore, compared to the conventional electrostatic recording head using a printed circuit board in which recording electrodes and matrix circuits are formed all at once on a copper-clad laminate using a photoetching method, the present invention requires sophisticated manufacturing technology. First, the production cost is low, and 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. 5 is a diagram showing an example of a new electrostatic recording head, FIG. 6 is a diagram showing an example of a printed wiring board used in the example, and FIG. 7 is a diagram showing a conventional example of the structure of a recording head. 8 is a diagram showing another example of a new electrostatic recording head, FIG. 8 is a diagram showing an example of a flexible printed circuit board (28) used in the other example, and FIG. 9 is a diagram showing an example of a flexible printed circuit board used in another example. 10 is a diagram showing an example of an electrostatic recording head manufacturing apparatus used in carrying out the present invention. FIG. 11 is a diagram showing an example of an electrode wire insulation film removal apparatus. Fig. 12 is a perspective view showing an example of control electrodes used in the new electrostatic recording head, and Fig. 13 is an enlarged detailed view of a flexible printed circuit board illustrating the connection of electrode wires in the new electrostatic recording head. It is. 101.201,401,501,701...recording electrode, 102,202,302,402.502,70
2.1210--control electrode, 103,403,50
3,703-3・Electrode holder, 104,304...
・Electrostatic recording paper, 405, 505, 705, 1040, 1
115.1305-- 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 life/electrode wire connection, 717... Electrode wire termination holder, 1010... Winding drum, 1050...φ・Insulating film removal device, 1060...Tension control mechanism, 10
90... Electrode wire spool. Agent: Patent attorney Kensuke Norichika (and 1 other person) (31)

Claims (4)

[Claims] (1) Lands for connecting electrode wires and matrix wiring are formed on a part of the peripheral surface of a columnar body having a thread groove on the peripheral surface, and a printed circuit board coated with a conductive adhesive is attached to the lands for connecting electrode wires, and The column is rotated and the electrode wire is wound around the column on which the printed circuit board is attached using the screw groove as a guide groove, and the electrode wire is wound around the column on which the printed circuit board is attached just before and when it is wound around the column. A method for manufacturing an electrostatic recording head, characterized in that an insulating film of an electrode wire is removed at a timing corresponding to a position that should coincide with an electrode wire connection land. (2) The method for manufacturing an electrostatic recording head according to claim 11, wherein the column is a cylindrical body and the printed circuit board is a flexible printed circuit board. (3) a small flame gas torch, a rotational drive means, a clutch means, and a control means for controlling connection and disconnection of the clutch means;
means for transmitting the motion of the rotary drive means when the clutch means is engaged, and causing the small flame to draw a closed loop trajectory in a plane perpendicular to the rotational axis of the rotary drive means, the flame traveling in a direction transverse to the closed loop; 1. An electrode wire insulation film removing device, characterized in that a part of the insulation film of the electrode wire to be removed is removed by the micro flame. (4) The means for causing the small flame to draw a closed loop trajectory includes a rotary lever having one end fixed to the rotating shaft of the clutch, one end pivotally supported by the other end of the rotary lever, and the other end fixed to a conduit connected to the gas torch. A closed loop consists of an operating lever, a swing lever whose one end is pivotally supported by a fixed pin, and a sliding bush that is fixed to the swing lever and slides in the pipe axis direction on the circumferential surface of the conduit connected to the gas torch. The electrode wire insulation film removing device according to claim (3), wherein the electrode wire insulation film removing device has a substantially elliptical shape.