JPS63137859A - Connector for ion flow generating type electrostatic recording head and circuit board - Google Patents

Abstract

PURPOSE:To prevent a connecting part from being damaged, eliminate the need for a spring contact pin and save space, by providing an electrode pattern extending in a direction orthogonal to an ion-discharging plane of an electrostatic recording head, and providing the connecting part to be fitted to the electrode pattern on the side of a circuit board. CONSTITUTION:A card edge connector 91 is electrically connected to a printed circuit board 90, and support plates 94 fixed to a support member 93 are disposed opposite to the connector 91. The support member 93 is fixed on the ion-discharging plane side of a screen electrode 33, and also supports a flexible printed circuit board 96 adhered to the support plates 94 erected on both sides of an aluminum base 95. The circuit board 96 comprises an electrode pattern 97 printed on a flexible film, and the support plates 94 are fixed to the member 93 by adhesion or screwing. The connector 91 is provided with opening parts 99 for receiving the support plates 94 inserted therein.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides an ion flow generation type electrostatic recording head that maintains reliable electrical connection and prevents damage to connection members, and a circuit board. Regarding connection devices.

[Conventional technology]

As an electrophotographic copying machine equipped with a conventional ion flow generation type electrostatic recording head, for example, US Pat. No. 4,155,093
There is something shown in the specification of the No. This electrophotographic copying machine includes an exposing means for exposing a photoreceptor to light reflected from an original, a charging means for charging the photoreceptor before exposure, a developing means for developing an electrostatic latent image formed by exposure with toner, and a toner image. It has a transfer means etc. around the photoreceptor drum for transferring the image to the recording medium, and in addition to these means, it generates an ion flow according to the image signal read from the image memory etc. to transfer the image to the photoreceptor drum. an ion flow generating means for forming an electrostatic latent image (hereinafter referred to as an electrostatic latent image to distinguish it from an electrostatic latent image based on exposure), and an ion flow generating means for forming an electrostatic latent image based on exposure as necessary. It has a static eliminating means for erasing the image.

In the above configuration, a document is placed on the document table, and
For example, company name, date, etc. to be added to copies of this manuscript content.
When you specify image information such as a department (hereinafter referred to as additional information) from the console panel and turn on the start button, an electrostatic latent image based on the exposure means and an electrostatic charge image based on the ion flow generation means are created on the photoreceptor drum. is formed, which is developed by a developing means and then transferred to a recording medium by a transfer means, and when the transferred image is fixed on the recording medium, a record having a copy corresponding to the original content and an additional information image is obtained on the recording medium. It will be done.

FIG. 42 fat, (S]), (cl indicate the connection part for connecting the power supply circuit, control drive circuit, etc. to the electrostatic recording head 5, which is the ion flow generating means described above, and is driven by high frequency and high voltage. The drive electrode 31 is negative 2 depending on the image signal.
a control electrode 32 to which a DC voltage of a certain value is applied, and a screen electrode 33 to which a DC voltage intermediate between the above-mentioned two values is applied.
A support member 93 is provided on the ion flow emitting surface side of the electrostatic recording head 5, and a support plate 97 having an electrode pattern 97 is provided on the upper surface of the support member 93. This electrode pattern 97 corresponds to the aforementioned electrode 31.3.
2.33 is connected. On the other hand, a printed circuit board 90 having a power supply circuit, a control drive circuit, etc. is connected to a contact pin support plate 400 via, for example, a card edge connector 91. The spring contact pin 121 is supported.

In the above configuration, when the contact pin support plate 400 is brought from above so as to straddle the electrostatic recording head 5 and the spring contact pin 121 is brought into contact with the electrode pattern 97, the electrostatic recording head 5
The desired connection between the electrodes 31, 32, 33 and the printed circuit board 90 is obtained.

[Problem that the invention seeks to solve]

However, with conventional connection devices between electrostatic recording heads and printed circuit boards, electrical contact is achieved by bringing a spring contact pin with a relatively sharp tip into contact with the electrode pattern, which can damage the electrode pattern. There is this inconvenience.

[Means to try to solve problems]

The present invention has been made in view of the above, and in order to prevent damage to the connection part and maintain reliable electrical contact,
The present invention provides a connection device between an ion flow generating electrostatic recording head and a circuit board, which achieves electrical contact by line or surface contact, avoiding point contact caused by abutment of the tips of spring contact pins. .

Hereinafter, the connection device between the ion flow generation type electrostatic recording head and the circuit board according to the present invention will be explained in detail.

In the following example, a support plate is provided on a surface parallel to a direction perpendicular to the ion emitting surface of the electrostatic recording head, an electrode pattern is formed on this support plate, and a card edge connector connected to a circuit board is attached to this support plate. I try to make a mating connection. According to this embodiment, damage to the electrode pattern is prevented, there is no need to use spring contact pins that have a complicated structure and are difficult to reduce costs, and the support plates take an orthogonal posture, so space can be saved.

In another embodiment, the ion flow generation type electrostatic recording head has a connecting pin erected, and a female terminal connected to a circuit board is connected to this connecting pin. This also provides the same effect as the embodiment described above.

Furthermore, in other embodiments, holes are formed in the electrode pattern into which spring contact pins are inserted to achieve electrical contact. This can prevent damage to the electrode pattern.

〔Example〕

(1) System structure Figure 1 shows an electronic copying machine equipped with an ion flow generation type electrostatic recording head (hereinafter simply referred to as a writing head).
A photoreceptor belt 2 in which an electrostatic latent image and an electrostatic charge image are formed.
A charging corotron 3 charges the photoreceptor belt 2 before forming an electrostatic latent image, and a partial static elimination lamp 4 partially erases the electrostatic latent image on the photoreceptor belt 2. , a writing head 5 that applies an ion flow to the photoreceptor belt 2 to form an electrostatic charge image, a developing device 6 that develops the electrostatic latent image and the electrostatic charge image on the photoreceptor belt 2, and the photoreceptor belt 2.
a transfer corotron 7 that transfers the upper toner image to recording paper;
A white corotron 8 that facilitates the separation of the recording paper from the photoreceptor belt 2, a refré clean corotron 9 that neutralizes the electric charge on the photoreceptor belt 2, and a cleaner 10 that cleans the photoreceptor belt 2 are provided. It is being A platen glass 11 on which a document is placed is provided above the exposure area of the photoreceptor belt 2, and a lens 13 is provided below the platen glass 11 to expose the photoreceptor belt 2 with light reflected from the document irradiated by a lamp 12. It is provided.

Inside one side of the main body 1 is a paper feed tray 1 that supplies recording paper.
4, above which is provided a duplex tray 15 for double-sided copying, further above which:
A discharge tray 16 is provided to receive recording paper.

A conveyance path 17 is provided between the paper feed tray 14 and the transfer area, and a conveyance path 18 is provided downstream of the transfer area, and the conveyance path 18 communicates with a fixing device 19 . Fuser 1
A conveyance path 20 is provided downstream of 9, which includes a path leading to an inverter 21 for inverting the recording paper and ejecting it to the duplex tray 15, and a path leading to an ejection tray 16 or ejecting the recording paper as it is to the duplex tray 15 without inverting it. The passage is branched into two passages.

A sorter 23 that receives recording sheets from a conveyance path 22 located above the duplex tray 15 is provided outside the main body 1 .

FIGS. 2(al) and (b) show the above-mentioned writing head 5,
Basically, the drive electrode 31 is driven by a high frequency voltage of 1 Hz, 3 KV (peak to peak), for example.
, a control electrode 32 that is turned on (for example, a DC voltage of -1200V) and turned off (for example, a DC voltage of -800V) according to a write signal; and a control electrode 32 that is applied with a DC voltage of, for example, -1000V, 2, and a screen electrode 33 that alleviates the influence of charges on the 2. Each electrode 31.32.
Insulator 34, 35, 36 on the surface or gap of 33
is provided, and the control electrode 32 is connected to the ion guide hole 32.
a, and the screen electrode has 33 ion release holes 33a. In FIG. 2 fa), 37 is a high voltage power source that drives the drive electrode 31, 38 is a high voltage power source that drives the control electrode 33, 39 is a high voltage power source that drives the screen electrode 32, and 40 is a high voltage power source that drives the high voltage power source 38. A control circuit 41 that controls according to a signal is a potential sensor that detects the surface potential of the photoreceptor belt 2 and inputs it to the control section 40 . Here, the ion guide holes 32a of the control electrode 32 and the ion discharge holes 33a of the screen electrode 33 are formed at a density of, for example, 240 dots/inch in the main scanning direction.

FIG. 3 shows the above-mentioned partial static elimination lamp 4, which includes a signal electrode 51 whose at least tip portions (arranged in an array) 50 are transparent electrodes, and a tip portion 50 of the signal electrode 51.
and a common electrode (not shown) having light emitting diodes (arranged in an array) between them, and selectively applying a voltage to the signal electrode 51 causes the light emitting diode array to partially emit light. I can do it.

FIG. 4 shows a control section 40 that controls the control electrodes 32 of the write head 5 described above according to a write signal, and a control section 40 that controls the write head 5 under control of the system control section of the electronic copying machine.
It has PU61. This CPU 61 is connected to its input side with the aforementioned potential sensor 41 and a selection key circuit 62 that outputs a key signal (described later), and on its output side is a character generator storing a predetermined character pattern. (ROM) 63 and a character generator (ROM) 63 as specified by CPIJ61.
A memory (1?AM) 64 for temporarily storing an image signal based on a pattern generated from the memory (RAM)
64 or a pattern generator 65 that generates a predetermined pattern signal based on an image signal of an image memory 67 (described later), a display 66 that displays the input contents of the selection key circuit 62, etc., and a predetermined standard image ( An image memory 67 that stores images (including sentences, etc.) is connected thereto. This pattern generator 65 is connected to a control electrode driver 68 that controls the control electrodes 32 of the write head 5 based on the write signal to be output, and the above-mentioned voltage is supplied from the high voltage power supply 38 based on whether the pattern generator 65 is turned on or off. Output.

FIG. 5 shows a selection key provided on the console panel 70, which causes the selection key circuit 62 to output a predetermined key signal. As is clear from the illustration, these selection keys are the company name key, date key, department key, patient key, network pattern key, ■ key, memory key, number key, alphabet key, space (SPACE) key, and execution ( EN
TER) key, etc.

In the above configuration, the operation will be explained as follows.

First, place the original t2 on the platen glass 11, and then
Additional information is entered manually by operating a predetermined selection key from the console panel 70. As additional information, for example, press "Fuji Xerox ■" from the "company name l" key, O mark from the ■ key, rs, 61.9.8J from the date key, and turn on the ENTER key. From the character generator (ROM) 63, a graphic pattern of @ and a character pattern of rs, 61.9.8J are generated and temporarily stored in the memo IJ (RAM) 64, and also stored in the image memory 67. The address of the fixed phrase "Fuji Xerox ■" is specified. At the same time, the user inputs the copy area of the additional information on the recording paper using the numeric keys. This input may be performed using a tablet or the like.

Here, when the start button is pressed to issue a copy command, the photoreceptor belt 2 rotates and receives a predetermined charge in the charge corotron 3.

On the other hand, when the lamp 12 is turned on and illuminates the document on the platen glass 11, the photoreceptor belt 2 is exposed to light reflected through the lens 13, and an electrostatic latent image is formed on its surface. When the area on which the electrostatic latent image has been formed passes through the partial static elimination lamp 4, the signal electrode 51 is moved according to the area where the additional information is copied.
is driven to light up the light emitting diode, and the area of the photoreceptor belt 2 corresponding to that area is irradiated to eliminate static electricity. When this charge-eliminated area passes the write head 5, the memory (
RAM) 64 and image memory 67 at a predetermined address are read out as image signals, which are converted into write signals by the pattern generator 65 and then applied to the corresponding control electrodes 32 of the write head 5 by the control electrode driver 68. -1200V (on) or -800V
(off) DC voltage is applied.

At this time, the drive electrode 31 generates ions (2) and (e) by applying the high frequency high voltage described above, and a DC voltage of -1000V is applied to the screen electrode 33. Therefore, when the control electrode 32 is turned on, the ion flow e is transferred from the ion guide hole 32a to the ion release hole 33a.
is generated toward the photoreceptor belt 2 through the control electrode 32.
When ion is turned off, the ions e are not emitted from the ion ejection hole 33a but are confined within the write head 5. the result,
The electrostatic charge image corresponding to the turning on of the control electrode 32 is the static charge removal j described above.
Formed in area J.

In this way, the electrostatic latent image and the electrostatic charge image formed on the photoreceptor belt 2 are developed with toner by the developing device 6. As the toner image on the photoreceptor belt 2 advances to the transfer area of the transfer corotron 7, a recording paper of a predetermined size fed from one of the paper feed trays 14 advances along the conveyance path 17, while being registered. , enters the transfer area and receives the transfer of the toner image on the photoreceptor belt 2 by the transfer corotron 7. The recording paper on which the toner image has been transferred is peeled off from the photoreceptor belt 2 by a corotron 8, reaches a fixing device 19 via a conveyance path 18, undergoes a fixing process, and is discharged from a conveyance path 20 to an output tray 16. be done.

FIG. 6 (al) indicates a recording paper 71 that has received such a record, and has additional information 71a such as a company name, a ■ mark, and a date on the upper part, and has a copy area 71b below it in accordance with the content of the original.

FIG. 6fb) shows a recording paper 71C having a copy 71c of a letter corresponding to the content of the original and a checkered pattern 71d overwritten by the writing head 5, and FIG.
C1 shows a recording paper 71 having an English letter 71e recorded by the writing head 5 functioning as a blinker.

Figure 6! In a), additional information is written in a predetermined area that has been neutralized by the partial static elimination lamp 4, but in FIG.
b) is the result of overwriting without performing any static elimination operation.

As is clear from the above explanation, it is possible to transfer the copy image and the additional information image in a single transfer operation, which improves the recording speed and completely takes into account fluctuations in the relative position of the two images due to overwriting. There's no need to.

Figure 7 shows two developing machines 6A in the electronic copying machine shown in Figure 1.
and 6B.

Here, since the same parts are indicated by the same reference numerals, a duplicate explanation will be omitted. The bias voltage is, for example, -50v.
The developing device 6B is for developing an electrostatic latent image of, for example, -700V formed by exposure based on document scanning, and the bias voltage is, for example, -300V. In addition, although a flash-type exposure device was used in FIG. 1, here a moving optical system consisting of a lamp 12, a lens 13, a reflecting mirror, etc. is used, and the transport route of the recording paper, etc. Although they are different, their explanation will be omitted here. In the figure, 7A is a blur transfer corotron, and 4 is a static elimination lamp, so there is no need for partial static elimination.

In the above configuration, the operation will be explained as follows. First, after electricity is removed from the photoreceptor belt 2 by the electricity removal lamp 4, an electrostatic charge image of -280V additional information is formed by the writing head 5.

This electrostatic charge image is developed with red toner by a developing device 6A with a bias voltage of 150V. Next, the photoreceptor belt 2
After being charged to -700V by the charge corotron 3, an electrostatic latent image corresponding to the content of the document is formed on the platen glass 11 by a moving optical system including a lamp 12, a lens 13, etc. developing machine 6
Develop with black toner using B. The two-color toner image thus formed on the photoreceptor belt 2 is subjected to pre-transfer processing by the pre-transfer corotron 7A, and then transferred to the recording paper by the transfer corotron 7.

The recording paper carrying the transferred image is peeled off from the photoreceptor belt 2 by the detassing corotron 8, reaches the fixing device 19 via the conveyance path 18, undergoes a fixing process there, and is then discharged to the discharge tray 16.

In the above description, development was performed with red toner in development a6A, but development may be performed with black toner or other toner.

As is clear from the above explanation, before forming a copy image, an electrostatic charge image of additional information is formed and developed, and the additional information image and the copy image are transferred in one transfer operation. Therefore, it is possible to improve the recording speed.

Further, since the electrostatic charge image of additional information and the electrostatic latent image for copying are developed with a bias voltage corresponding to their potentials, they can be developed with the same density.

(2) Maintaining the flatness accuracy of the photoreceptor belt FIG. The photoreceptor belt 2, which moves endlessly in the direction, is supported by a plate 80 extending across the width from the back side of the photoreceptor belt 2 in the area where the write head 5 is located. In the figure, 4 is a partial static elimination lamp, and 6 is a developing machine.

As in the above configuration, since the photoreceptor belt 2 is pressed by the plate 80 from the back side, the photoreceptor belt 2 is pressed against the plate 80 due to the tension of the photoreceptor belt 2.
Thereby, the distance between the contact head 5 and the image forming surface of the photoreceptor belt 2 is kept constant with high precision. At the same time, the generation of wrinkles on the photoreceptor belt 2 is prevented.

Therefore, it is possible to form an electrostatic charge image that does not cause image blur, blur, or density unevenness.

FIG. 9 shows a unit that holds the plate 80 shown in FIG. 8, in which the plate 80 is fixed to a side plate 81 and a feed roller 8 that moves the photoreceptor belt endlessly.
2.83.84.85 are rotationally supported.

In this way, by supporting the plate 80 and the feed rollers 82 to 85 on the side plate 81 and forming a unit, the configuration can be simplified and the workability of assembly can be improved.

Fig. 10 (al) shows a plate 80 with a curved surface, which reduces contact resistance with the photoreceptor belt 2 and improves movement characteristics, and Fig. 10 ('b) shows a plate 80 with a curved surface. The plate 80 is supported by a holder 86 via a spring 87, and even if tension fluctuation occurs in the photoreceptor belt 2, it can be absorbed and prevent local sagging.

(3) Figure 11 of the writing head and printed circuit board (al
, (bl, (C)) indicate a connecting portion for connecting a printed circuit board 90 including a power supply circuit, a driving circuit, etc. to the writing head 5 (FIG. 2(a)).

In FIG. 11 (al), a card edge connector 91 (described later) is electrically connected and fixed to a printed circuit board (motherboard) 90, and a support plate 94 fixed to a support member 93 is positioned opposite to this. ing.

The support member 93 supports the screen electrode 33 of the writing head 5.
(FIG. 2(a)) is fixed on the ion emitting surface side,
Support plates 9 located upright on both sides of the aluminum base material 95
It supports a flexible printed circuit board 96 which is adhered to 4. The flexible printed circuit board 96 is made by printing an electrode pattern 97 on a flexible film such as polyimide, and the support plate 94 that adheres and supports this is made of a glass cloth epoxy laminate with a thickness of about 1.5 μ+. It is fixed to the support member 93 with adhesive or screws. The electrode patterns 97 include, for example, 16 patterns for the drive electrode 31 (FIG. 2(a)) of the write head 5, 128 patterns for the control electrode 32 (FIG. 2(a)), and l pattern for the screen electrode 33. It consists of a total of 145 patterns. FIG. 11(b) shows a pin tip 98a electrically connected to a printed circuit board 90 and an electrode pattern 97.
For example, a pin 98 having a contact portion 98b in pressure contact with
Card Edge Connector 91 with only the 145 wood mentioned above
, and is shown in an inverted shape from the posture of FIG. 11 ta+. As is clear from the illustration, the card edge connector 91 has an opening 99 into which a support plate 94 having a flexible printed circuit board 96 is inserted and fitted. Note that FIG. 11(c) shows a cross section of a flexible printed circuit 96 having a support member 93, a support plate 94, and an electric fence pattern 97, but since it is clearer than the illustration, the explanation will be omitted.

As is clear from the above explanation, the electrode connection part is placed 90' away from the ion emitting surface, which saves space, and since the motherboard is connected with a general-purpose card edge connector, it is inexpensive and has a long life. can be expected.

12(a) to 16(e) from FIGS. 12(a) to 16(b) show other connection configurations between the writing head '5 and the power supply circuit, drive circuit, etc. In BL, the head mounting case 100 has a head mounting opening 101a and an insertion slot 101b at the bottom, a guide member 103 for moving the connector housing 102 up and down inside, and a head mounting/detachment lever 10.1 on the side. A slit 105 to be operated is formed.

The connector housing 102 has a connector portion 102a having a pin therein to be connected to a connecting pin described later, and is interlocked with an attachment/detachment lever 104 by engagement described later. Fig. 13 fal, mountain) is the connecting pin 106 at the top.
The writing head 5 is shown having a mounting plate 107 inserted into the insertion slit 101b of the case 100. 1st
4(a) and (b) show the state in which the writing head 5 is attached to the head attachment case 100. The writing head 5 is inserted into the opening 101b at both ends of the mounting plate 107, and the writing head 5 is inserted into the opening 101a. When the attachment/detachment lever 104 is rotated counterclockwise, the connector housing 10 interlocks with the attachment/detachment lever 104.
2 is lowered and the connector portion 102a connects with the connecting pin 106.

Figures 15 (al, bl) Figures 16 (a) to (e) show the parts constituting the connection section described above. Here, the same parts are indicated by the same reference numerals, so explanations will be redundant. Although omitted, the connector housing 102 is connected to the guide member 10.
3, and is formed with a retaining slit 110 that engages with and interlocks with the protrusion 111 of the attachment/detachment lever 104, and draws out the connection between the connector part 102a and the connecting pin 106 to the outside. 109 is newly illustrated.

As is clear from the above explanation, the write head
Since a board having a 100 mm is provided and a portion of the connector is connected to the connecting pins, the write head can be easily attached and detached.

Further, the replacement can be performed from the front of the copying machine.

Naturally, it is possible to reduce costs and improve connection reliability.

Figure 17 (al, (bl) is the write head 5 (Figure 2 (a)
)) and the control board 90.

A glass epoxy lower circuit board 120 on which an electrode pattern 97 is formed is fixed to a support member 93 (FIG. 11(a)) fixed to the screen electrode 33 (FIG. 2(a)) of the writing head 5. There is.

An aluminum substrate 95 is provided on the circuit board 120, and through holes 97 are formed in electrode patterns 97 located on both sides of the aluminum substrate 95.
a is formed. Above the lower circuit board 120,
An upper circuit board 124 made of glass epoxy is located on which a card edge connector 123 having a pin 121 inserted into the through hole 97a and a pin 122 connected to the pin 121 is fixed. The card edge connector 123 has an opening 125, above which a control board 90 having an electrode pattern 126 is located. The pin 121 has a pin 127 that is soldered to the upper circuit board 124 and a spring 129 that forces the tip contact portion 128 inserted into the through hole 97a downward.

In the above configuration, the control board 90 is inserted into the opening 125 of the card edge connector 123, and the upper circuit board 1
By inserting the 24 pins 121 into the through holes 97a of the lower circuit board 120, a predetermined electrical connection is achieved.

As is clear from the above explanation, a through hole is provided in the power supply pattern of the write head board (lower circuit board), and a pin with a tip contact portion that is elastically downwardly worked is inserted into this through hole. In this case, the electrode pattern on the write head substrate does not peel off or become depressed, and a proper electrical connection can be obtained.

FIG. 18 shows an electrophotographic copying machine having a short writing head 5, for example, 100 nm or less in length in the width direction of the photoreceptor belt 2. The rest of the configuration is the same as that in FIG. 1, so the explanation will be omitted.

With the above configuration, predetermined additional information such as a company name, date, etc. can be recorded in a predetermined area within 100 nm from the edge of the recording paper. At this time, the electrostatic latent image in that area may be deleted by the partial static elimination lamp 4;
The electrostatic latent image may be overwritten with an electrostatic charge image by the writing head 5 without operating the electrostatic latent image. Shortening the write head makes it possible to downsize and simplify the drive circuit, thereby reducing costs.

FIG. 19 shows another electrophotographic copying machine having a short writing head, for example, 100 mm or less, and whose construction corresponds to that of FIG.

In comparison with the electrophotographic copying machine shown in FIG. 7, the difference is that a photoreceptor drum 2 is used instead of the photoreceptor belt, and that a static elimination lamp 4A is used before the charge corotron 3. The other configurations are the same, so the explanation will be omitted.

In FIG. 20 fal, (b), a short writing head 5 is moved in the width direction of the photoreceptor belt 2 (or drum), and the writing head 5 is suspended from a rail 130.
Further, a partial static elimination lamp 4 having a length equal to the width of the photoreceptor heald 2 is fixed to one side thereof. The writing head 5 is fixed to a belt 131, and the belt 131 is passed around a drive roll 132 and an idler roll 133.

FIG. 21 shows a control circuit for controlling the movement of the writing head 5, and includes, for example, a position input circuit 140 for inputting a writing area (address) for additional information using the numerical keys of the console shown in FIG. A recording paper size detection circuit 141 outputs a recording paper size signal in response to a button or a signal from a size sensor that specifies the recording paper size, and a recording paper size detection circuit 141 that outputs a recording paper size signal based on a signal from a button or size sensor that specifies the recording paper size, and detects the movement amount and portion of the writing head 5 based on the writing area and recording paper size. A CPU 142 that calculates the lighting area and lighting timing of the static elimination lamp 4, a drive circuit 143 that outputs a drive signal based on the amount of movement of the writing head 5 to drive the pulse motor 144, and a CPU 142 that calculates the lighting area and lighting timing of the partial static elimination lamp 4. It has a lamp drive circuit 145 that drives the partial static elimination lamp 4 based on lighting timing.

In the above configuration, the operation will be explained as follows. First, when the operator specifies the content of the additional information, the size of the recording paper, and the recording area of the additional information, the control circuit shown in FIG. Calculations based on the paper size and recording area are performed by the CPU 142. When the photoreceptor belt 2 carrying an electrostatic latent image based on the content of the original passes the partial static elimination lamp 4, the CPU 142 lights up the light emitting diode array over a predetermined width according to the additional information, and lights it up for a predetermined time period. Continue. Before the photoreceptor heald 2, which has the electrostatic latent image from which a predetermined area has been deleted, passes the writing head 5, the CPU
142 drives a pulse motor 144 via a drive circuit 143, and the belt 131 is rotated by rotation of the drive roll 132.
The writing head 5 fixed to is moved to a predetermined position. At this time, when the additional information writing area of the photoreceptor belt 2 passes, an ion flow is generated according to the content of the additional information, and the charge of #% of the additional information is applied to the static elimination area of the photoreceptor belt 2.
form an elephant. Thereafter, the writing head 5 returns to the home position, and predetermined recording is performed on the recording paper by developing, transferring, and fixing the electrostatic image.

As is clear from the above description, additional information can be recorded at any position on the recording paper, regardless of the size of the recording paper, while using a short writing head.

FIG. 22 shows a control circuit for using the short writing head 5 shown in FIGS. 20(a) and 20(t) as a printer, and the control circuit shown in FIG.
45 is deleted, and on the other hand, an information width generation circuit 146 that generates a signal of the width of image information (length in the main scanning direction) and a position information generation circuit 147 that generates position information of the photoreceptor belt 2.
is added.

In the above configuration, the operation will be explained as follows.

The CPIJ 142 determines the area 150 corresponding to the recording paper on the photoreceptor belt 2 based on the size signal from the recording size detection circuit 141. At the same time, the information width generation circuit 146
The position of the write head 5 is determined based on the signal of the width of the image information. As a result, the pulse motor 144 is driven via the drive circuit 143, and the rotation of the drive roll 132 moves the writing head 5 fixed to the belt 131 to a position corresponding to the first writing area 151.

Thereafter, the control electrode 32 (not shown) of the write head 5 is turned on and off according to the image information to form an electrostatic charge image in the write area 151. This state is shown in FIG. 23 fal. Next, the writing head 5 is moved from the first electrostatic charge image forming area 151A to the next writing area 152. Thereafter, when the position information generating circuit 147 detects one revolution of the photoreceptor belt 2, image information is recorded in the writing area 152. This state is shown in FIG. 2 fbl.

As is clear from the above description, since a short writing head can be used as a printer, versatility can be increased while suppressing cost increases. In this case, a write head that generates an ion flow was used, but by charging the photoreceptor belt in advance and driving a short write head of a light emitting diode array or liquid crystal according to the image information, the electrostatic charge can be reduced. It is also possible to form a latent image.

The electrophotographic copying machine of FIG. 1 will be explained based on the flowchart of FIG. 24. First, the photoreceptor heald 2 is charged by the charge corotron 3, and the platen glass 1 is charged.
It is exposed by the light reflected from the original on 1. The electrostatic latent image formed on the photoreceptor belt 2 by exposure has a potential of -700V and is developed by a developing device 6 having a bias voltage controlled to -300V.

The toner image developed in this way is transferred to the transfer corotron 7.
The image is transferred from the conveyance path 17 onto a recording sheet, and then enters the fixing device 19 from the conveyance path 18 and is fixed.

The fixed recording paper enters the inverter 21 from the conveyance path 20 and is stored in the duplex tray 15 from there.

Since a command to record additional information has been input before this operation, the photoreceptor belt 2 cleaned by the cleaner 10 passes through the charge corotron 3 without being charged, and the image forming area is located on the writing head 5. When the writing head 5 reaches the position , the writing head 5 is driven according to the additional information to form an electrostatic charge image on the photoreceptor belt 2 . This electrostatic charge image is -280
Since the developing device 6 has a potential of V, the developing device 6 develops the electrostatic charge image based on a bias voltage controlled to -50V. Recording paper is fed from the duplex tray 15 in synchronization with the timing at which this toner image reaches the transfer corotron 7, passes through the conveyance path 7, is registered, and is then transferred by the transfer corotron 7. The recording paper onto which the toner image has been transferred enters a fixing device 19 via a conveyance path 18, and is discharged from a conveyance path 20 to a discharge tray 16.

As is clear from the above explanation, even if the potential of the electrostatic latent image created by ion writing is lower than the potential of the electrostatic latent image of the copying machine because the amount of charge per unit time is smaller than that of the charge corotron 3, the developing By controlling the bias voltage of the machine 6 to a predetermined value, it is possible to develop at the same density. This tendency increases as the rotational speed of the photoreceptor belt 2 increases, but it can be counteracted by controlling the bias voltage. Therefore, it is possible to increase the recording speed.

(5, 2) Control of erasing black images by Seiho and Seiryosu Partial static elimination lamp 4 of the electrophotographic copying machine shown in Fig. 1 (Fig. 3)
The lighting control circuit of is shown in FIG.

This lighting control circuit includes an area signal generation circuit 160 that generates an area signal in which additional information such as page and date is recorded, a priority signal generation circuit 161 that outputs a priority signal when the additional information has priority over document information, and a recording A size signal generation circuit 162 that generates a paper size signal, a timing signal generation circuit 163 that generates a recording paper conveyance timing signal,
A gate circuit 164 that receives an area signal and a priority signal as input, a size signal, a transport timing signal, and a gate circuit 1
It has a gate circuit 165 which inputs the output signal of No. 64. The gate circuit 165 is a control unit 166 centered on the CPU.
The control unit 166 is connected to the decoder driver 167
It is connected to the. The decoder driver 167 applies a voltage Vc to each divided group of the light emitting diode array 168.
It is connected to a transistor 169 that applies c and a transistor 170 that simultaneously grounds the corresponding transistors between each group.

In the above configuration, the operation will be explained based on the flowchart of FIG. 26 as follows. When the operator selects the content of the additional information, area designation, priority designation of the additional information, recording paper size, etc. from the console panel, the information is input to the control unit 166 via the gates 164 and 165. The control unit 166 processes this information using a predetermined program and temporarily stores the results in internal RAM. After an electrostatic latent image is formed on the charged photoreceptor belt 2 based on document scanning, when the area passes through the partial static elimination lamp 4, the control unit 166 adds an electrostatic latent image based on the contents stored in the RAM. A control signal is output to eliminate static electricity from the area where the information image is formed. When the decoder driver 167 inputs this control signal, it decodes it, turns on the corresponding transistors 169 and 170, and lights up the light emitting diode 168 at the position corresponding to the area where additional information is formed. If an electrostatic latent image forming a black image is formed in the corresponding area by this lighting, it is erased. Thereafter, when that area passes through the write head 5, an electrostatic charge image is formed according to the additional information.

In the above explanation, the partial static elimination lamp 4 is used to eliminate static electricity in the area where additional information is formed, but it is also possible to eliminate static electricity in the margin area other than the image information area, and between multiple images that are formed serially. can. Naturally, instead of the partial static elimination lamp 4, an erasure lamp provided for static elimination may be used.

'-5, 3) 91-body belt charge erasing mode control second
Figure 7 is a flowchart of this control, and Figure 2 fal
In the write head 5 shown in FIG. 1, when additional information is not written by the ion flow, the write head 5 is used as a charge erasing means for the photoreceptor belt 2. When the control unit 40 receives this control command, + is applied to the control electrode 32.
Applying a DC voltage of 200V to the screen electrode 33
Apply v. As a result, the ions (1) and (e) generated by the drive electrode 31 reach the photoreceptor heald 2 through the ion discharge hole 33a, neutralize the charge on the photoreceptor belt 2, and erase the charge. In this case, the control electrode 32 has +20
Since a DC voltage of 0V is applied, AC ions that are slightly biased can be emitted.1. The negatively charged photoreceptor belt 2 can be effectively neutralized.

As is clear from the above explanation, the ion flow write head 5
can be used as a charge erasing means, eliminating the need for an erase lamp and reducing costs. Furthermore, if the user is given the option of replacing the erase lamp with this write head 5 as necessary,
Furthermore, versatility can be improved.

(5, 4) - 1 豫 4 power control (5, 4, 1
) FIG. 28 (al indicates a control circuit for suppressing density unevenness due to variations in the characteristics of the writing head 5 or variations in the mounting accuracy of the corotron (for example, tilting with respect to the photoconductor heald 2); A writing head 5 is provided with a predetermined gap from the photoreceptor belt 2, and a light emitting diode array 180 is provided on the opposite side.

The photoreceptor belt 2 has a grounding conductive region 182 on one side, and a grounding sleeve 183 is in contact with this conductive region 182. The earthing sleeve 183 is brought into contact with switches 184 and 185, the switch 184 is opened and closed with the earth, and when the switch 185 is turned on, it is earthed through a resistor R (for example, IOMΩ).

Voltage detection circuit 181 for detecting the terminal voltage of resistor R
is connected, and the detected value of the voltage detection circuit 181 is input to the CPU of the control unit 40 after digital conversion. The control unit 40 includes this CPU, a ROM for programming, a RAM for temporarily storing data, etc., and a non-volatile 1? AM, and this control unit 40 has a drive electrode 31 (Fig. 2 (a), (bl), control electrode 3
2 (Fig. 2 (a), (b)) and the screen electrode 33
(Fig. 2 (a), (b)) is connected to the power supply 37, 38, 39 that applies the aforementioned set voltage, and the control electrode power supply 3
8 applies the aforementioned setting voltage to each of the 12 divided control '4'' fE electrodes 32 (FIG. 2) via a divided drive circuit 186. A length of 240 SPI and 2796 dots is used, and by dividing into 12, each divided unit has 233 dots.
A dot is assigned. In the following explanation, only the control electrode 32 is divided into 12 to perform divided driving control, but the drive electrodes i31 (FIG. 2(b)) and the screen electrodes 33, which are normally arranged in six rows, and the flower screen electrodes 33 It may also be divided into 12 parts and driven separately.

In the above configuration, with the light emitting diode array 180 turned on and the photoreceptor heald 2 made conductive, Vo=3KV (IMHz) is applied to the drive electrode 31, and Vs=-1000V (DC) is applied to the screen electrode 33. Then, each divided unit 1.2 of the control electrode 32 is supplied from the control electrode power source 38 via the divided drive circuit 186.
...A negative DC voltage is applied to the 12 groups of 12 in order. In each divided unit, the control electrode voltage is controlled in the range of -1000V to -1500V so that the current flowing through the resistor R is 10 μA (terminal voltage IV of the resistor R) based on the output of the voltage detection circuit 181. It is stored in nonvolatile RAM as a set voltage for subsequent operations.

FIG. 28(b) shows the set voltage stored in the nonvolatile RAl'l.

This operation is performed at the time of factory shipment or during service mode. In normal copying operations, switch 184 is turned on, switch 185 is turned off, and write head 5 is controlled based on the set voltage stored in the nonvolatile RAM. In the above description, only the control electrode voltage was controlled, but the drive electrode voltage or the screen electrode voltage may also be controlled.

As is clear from the above explanation, since the drive voltage is divided and controlled so that the ion flow is constant throughout the write head, even if the mounting accuracy of the write head varies, unevenness in the developed density due to uneven charging can be avoided. This also eliminates unevenness in developed density due to variations in the characteristics of the writing head in the longitudinal direction.

The control system in Figure 28fa) controls changes in temperature and humidity,
It may be used to suppress fluctuations in charge density due to aging of the write head 5.

In this case, there is no need to drive the write head 5 in parts. Here, the resistor R is set to IKΩ, and the voltage of the control voltage 32 is controlled so that the output of the voltage detection circuit 181 becomes 10 V (current value is 1 mA).

This voltage control is 50V in the range of -600V to -1500V.
It is sufficient if the detection voltage is a value of IOV ±5% by step control of V.

(5, 4, 2) Fig. 29 shows a method for suppressing fluctuations in the surface potential of an electrostatic image due to changes in temperature and humidity, deterioration of the sensitive material, deterioration of the writing head, etc. A surface potential measurement area 2B having a width of 20 mm is provided on one side of the photoreceptor belt 2.

This photoreceptor belt 2 is supported by a feed roll 83, and a potential sensor 190 is placed opposite the surface potential measurement area 2B.
is provided. The writing head 5 has a length of 340 fins so as to be able to print A4 horizontal size, and the portion corresponding to the surface potential measurement area 2B generates an ion flow regardless of recorded information. The potential sensor 190 is connected to the control unit 40, and the control unit 40 has a configuration for controlling the power supply circuit 191 of the write head 5 and the bias voltage of the developing device 6.

In the above configuration, when the writing head 5 starts forming an electrostatic charge image of additional information, or prior to that, the surface potential measurement area 2B is charged, and the potential sensor 190 measures the charged potential. The control unit 40 is a potential sensor 190
The output of the write head 5 is compared with a reference value stored in advance, and based on the deviation, the power supply circuit 191 is controlled by +1fJ and the electrodes of the write head 5 (drive, control, and screen electrodes, or any one or two control the voltage applied to In addition to or in place of this, the bias voltage of the developing device 6 is controlled.

(5, 4, 3) FIG. 30 indicates that the writing head 5 should be replaced due to deterioration and stops the writing operation by the writing head 5. A potential sensor 190 is provided to measure the surface potential of the electrostatic charge image produced by the write head 5.
The potential sensor 190 is connected to a comparator 200 that compares it with a first level E, and a comparator 201 that compares it with a second level E2 (E.

>Ez), the comparators 200 and 201 are connected to the control unit 40, and the control unit 40 is connected to the replacement indicating diode 204 or the operation stop indicating diode 205 via ports 202 and 203.

In the above configuration, when an electrostatic charge image of additional information is formed on the photoreceptor belt 2 by the writing head 5, the potential sensor 190 detects its surface potential. In the normal case, since the output E of the potential sensor 190 is E>El and E>EZ, the control unit 40 does not light the light emitting diodes 204 and 205 and does not output a stop signal. On the other hand, due to deterioration of the write head 5, the surface potential decreases, E<El, E
> Ez, the light emitting diode 20 is turned on by outputting a deterioration signal from the boat 202 and turning on the transistor.
4 is lit to prompt the operator to replace the write head 5.

If the writing head 5 continues to be used without being replaced despite the indication that the writing head 5 should be replaced, the surface potential will further decrease to E<EI, E<Ez, and the control unit 40 will change the state of the light emitting diodes 204 and 205. Both are turned on and the operation of the write head is stopped by a stop signal.

As is clear from the above explanation, since the deterioration of the write head 5 is displayed, the write head 5 can be replaced before image quality deterioration occurs, and if it is not replaced, the operation is stopped, so the image quality is reduced. It can prevent bad records from being made.

(5, 4, 4) Fig. 31 (al is the one in which the writing head 5 is provided on the photoreceptor belt 2 with a gap of g = 230 μm, and the writing head 5 is connected through the resistor R of IMΩ. It has a grounded counter electrode (for example, a 0.3 mm copper plate) 210.The terminal voltage of the resistor R is detected by a voltage detection circuit 181, and the subsequent stage configuration is a 29th Figure 31 fbl shows the configuration of the write head 5 in the part where the counter electrode 210 is located, in a configuration with a drive electrode 310, a control electrode 320, a screen electrode 330, and an insulator 340, 350, 360. corresponds to the configuration in FIG. 2(al). FIG. 31(e) shows the writing head 5, and the portion to the left of the boundary line A is the portion that generates the ion flow toward the counter electrode 210 described above. The portion on the right side is an image forming portion that generates an ion flow toward the photoreceptor belt 2.

Here, the control electrode 320 has a size of 2.5×2.5 cm, and is configured to emit a large amount of ions toward the counter electrode 210 by providing a large number of ion emitting holes.

In the above configuration, when the writing head 5 is driven, an electrostatic charge image corresponding to additional information is formed on the photoreceptor belt 2, and a current corresponding to the ion flow flows from the counter electrode 210 via the resistor R. . The control section 40 includes a voltage detection circuit 181
The power supply circuit 191 is controlled so that the detected voltage value becomes IV (current value is 1 μA), and the electrode voltage of the write head 5 is set to an appropriate value. At the same time, the bias voltage of the developing device 6 may be controlled.

Here, the distance between the writing head 5 and the photoreceptor belt 2 is 23.
Although it can be attached with a high precision of 0 μm±50 μm, since the counter electrode 210 is provided on the outside of the photoreceptor belt 2, the attachment is easy.

As is clear from the above explanation, since the drive voltage of the write head is set by directly measuring the charge density, images with constant density can be formed regardless of changes in temperature, humidity, head deterioration, etc. It can be carried out.

FIG. 32 (al indicates feeding, and a writing head 5 that forms an electrostatic image of additional information on the photoreceptor belt 2 supported by a roll 83 is provided, and heaters 22 are installed on both sides of the writing head 5.
0 is set.

A temperature sensor (thermistor) 230 is attached to the heater 220, and a temperature sensor (thermistor) close to the heater 220 detects the temperature of the photoreceptor belt 2.
240 are provided. The temperature sensors 230 and 240 are connected to R/V converters 231 and 232 that perform resistance/voltage conversion, and the outputs of the R/V converters 231 and 232 are connected to the control unit 4.
It is set to be input as 0. The control unit 40 performs arithmetic processing on the outputs of the R/V converters 231 and 232,
A switching transistor 223 is connected to its output side via a port 233. The emitter of the switching transistor 223 is grounded, and the collector is connected to the heater 220 (attached to the write head 5).
The heater 220 is connected to the temperature fuse 221.
It is connected to the voltage aVc via.

FIG. 32(b) shows a contact type temperature sensor using a thermistor, which is installed on the upper part of the heater 220, and is elastically compressed by a chloroprene rubber 253 molded and fixed to a bracket 250, thereby forming a temperature sensor. 230 is connected to the heater 220 via the polyimide tape 252
It has come to be in close contact with Note that 251 is a signal lead wire of the temperature sensor 230.

In the above configuration, when a signal of "1" is output from the control unit 40 to the transistor 233 via the port 232, the transistor 223 is turned on and the heater 220 is activated. The writing head 5 is heated by the operation of the heater 220, and the atmosphere in which the ion flow is generated is dehumidified to suppress a decrease in charge density. Here, the control unit 40 uses the temperature sensor 230
．． The temperatures of the write head 5 and photoreceptor heald 2 are input from 240 via R/V converters 231 and 232. At this time, if the temperature of the photoreceptor belt 2 exceeds, for example, 40° C., the transistor 223 is turned off and the operation of the heater 220 is stopped. This prevents the photoreceptor belt 2 from losing photoconductivity due to crystallization.

There is a risk that the photoconductivity will be lost at temperatures of 40 to 60°C.

On the other hand, if the temperature of the photoreceptor belt 2 is below a predetermined value,
The heater 220 is appropriately turned on and off based on the temperature of the write head 5 to control the temperature within a predetermined range.

In FIG. 33, the control unit 40 is replaced with a hardware circuit configuration, and when the temperature of the heater 220 is low, the resistance value of the temperature sensor 230 becomes large, and the output of the differential amplifier DA becomes large. The differential amplifier DA+ has a reference voltage inputted to its negative terminal from a parallel circuit of a Zener diode ZD and a capacitor C. When the output becomes large, the diode group D+ turns on, turning on the transistor 223 and turning on the heater 2.
20 is activated. When the temperature of the photoreceptor belt 2 increases due to the operation of the heater 220, the resistance value of the temperature sensor 240 decreases, and the output of the differential amplifier DA2 decreases. The reference voltage is equal to the reference voltage mentioned above. Differential amplifier D
When the output of A2 becomes small, the differential amplifier 111A.

Since the difference between the output of
3 is turned off, and the operation of the heater 220 is stopped.

(6,2) Humidity sensor 255 is attached to the screen electrode 33 of the writing head 5 shown in FIG. 2 (fat). b
As shown in (C), a pair of comb-shaped gold electrodes 257 are screen printed on the alumina substrate 256, and then a solution of styrene sulfonate, which is a moisture sensitive material, and a crosslinking agent is added to the alumina substrate 256. It is coated on top and irradiated with ultraviolet rays to perform crosslinking and polymerization to form Moisture Sensitive V, 258.

A protective film 259 is provided on the temperature-sensitive film 258, and is of a type that reduces electrical resistance when the humidity reaches an upper limit. Note that 257a is a terminal lead.

FIG. 35 shows an 11 control circuit using this humidity sensor 255, which is composed of a humidity detection circuit do. Now, when the humidity increases and the resistance value of the humidity sensor 255 decreases, the output of the differential amplifier DA, which inputs the reference voltage controlled by the Zener diode ZD to its positive terminal, increases.

When this output becomes large, the output of the differential amplifier DAa becomes large, and the emitter output of the transistor TR becomes large.
The primary voltage of the transformer T increases, increasing the level of the high frequency voltage applied to the drive electrode 31 of the write head 5. In addition, transistor TR, capacitor C2,
C3, C4, inductance L, etc. constitute a high frequency oscillation circuit.

(6, 3) Figure 36 (al, (bl) is, for example, a heating element pattern 261 formed on the writing head 5 shown in Figure 2 (al). It is formed on an insulating layer 260 of alumina (A7!203) provided on the screen electrode 33.As mentioned above, the gap between the writing head 5 and the photoreceptor belt 2 is set to a high precision of about 230 μm±5 μm. Since it is maintained, the heat generating layer (resistance layer) 2
The total thickness of 61 and the insulating layer 260 is preferably 200 μm or less. In addition to alumina and ceramics, the insulating layer 260 is suitably made of a glass glaze mainly composed of SiO□ and PbO.
Insulating/resistive materials used in normal thick film processes, such as Ag-Pd and Au-Pt, can be used. In addition, heating layer 2
The reference numeral 61 may be a sheet resistor formed over the entire surface without being patterned. In this case, ion emitters 12 must be formed on that surface.

As is clear from the above description, since only the narrow gap between the writing head 5 and the photoreceptor belt 2 is heated, it is possible to reduce the power consumption and shorten the warm-up period.

(6, 4) Moisture absorbent FIG. 37(a), (bl) is used to surround the atmosphere with the case 271 when an electrostatic charge image is formed by the writing head 5 on the photoreceptor belt 2 supported by the feed roller 83. ,
A desiccant 274 such as silica gel is enclosed in a case 271 to dehumidify the inside thereof. 273
is a metal plate that fixes the desiccant 274 and is provided with a hole for breathing, and is also a metal plate that fixes the desiccant 274.
A sponge 272 is placed between them to enhance the dehumidification effect inside the case 271. The perforated metal plate 273 may be replaced with a mesh or the like. Note that 4 is a partial static elimination lamp.

In FIG. 38, the photoreceptor belt 2 is replaced with a photoreceptor drum 2, and the same parts are indicated by the same reference numerals, so redundant explanation will be omitted.

As is clear from the above description, since the ion flow generation atmosphere can be dehumidified with a simple structure, ions with a predetermined charge density can be generated without increasing the cost.

Further, it is also possible to prevent stains caused by the writing head 5.

``Lman-tiz儒 [One side wind Figure 39 Cat, (b) is a method in which dry air is forcibly blown into the atmosphere where ion flow is generated, and partial static elimination is carried out in opposition to the photoreceptor belt 2 supported by the feed roller 83. A lamp 4 and a writing head 5 are provided, and an air duct 284 is positioned so as to surround the writing head 5.
Dehumidifying filter 2 supported by cover 281 at the tip of 4
82 and a blower fan 283 are provided. 40th
Figures (a) and (b) show the dehumidifying filter 282, with sponge or! FM290 is placed between which a desiccant 27 such as silica gel is held by a case 291.
4 is accommodated. The desiccant 274 is divided into multiple parts,
A gap 292 is formed between them.

In the above configuration, when the write operation of the additional information on the write head 5 is started, the blower fan 283 is driven and blows the air that has passed through the dehumidification filter 282 around the write head 5 . Therefore, the ion generation atmosphere of the write head 5 is dehumidified, and stable ion generation can be obtained.

(6, 6) Improvement of ion ejection hole FIG. 41 shows a write head 5 with a drive electrode 31 and
Consisting of a control type 8i32 having an ion guide hole 32a and a screen electrode 33 having an ion discharge hole 33a, the ion guide hole 32,1 and the ion discharge hole 33a
has an oval shape that is elongated in the process direction (sub-scanning direction).

As described above, since the ion emitting holes are made longer in the process direction, recording speed can be increased without increasing the drive voltage.

〔Effect of the invention〕

As explained above, according to the connection device between the ion flow generation type electrostatic recording head and the circuit board of the present invention, an electrode pattern or an electrode pin extending in a direction perpendicular to the ion emitting surface of the electrostatic recording head is provided. The connecting part for mating or male/female connection is provided on the circuit board side, which prevents damage to the connecting part, eliminates the need to use spring contact pins with a relatively complex configuration, and saves space. be able to. Further, when using the spring contact pin, since a hole is provided in the electrode pattern and the spring contact pin is inserted into the hole, damage to the electrode pattern can be prevented.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing an electrophotographic copying machine equipped with an ion flow generation type electrostatic recording head, 2nd view (a) and (bl are explanatory diagrams showing an ion flow generation type electrostatic recording head, and Fig. 3 4 is a block diagram showing the control system, FIG. 5 is an explanatory drawing showing the console panel, and FIG. An explanatory diagram, FIG. 7 is an explanatory diagram showing another electrophotographic copying machine equipped with an ion flow generation type electrostatic recording head. From FIG. 8, 10 (a) and (b) support a flexible endless photoreceptor belt. Explanatory diagrams showing the plate and supporting means, FIG. 11 (al, (b), (from C1, FIG. 17 (a), fb) show the ion flow generation type electrostatic recording head, the power supply circuit, and the electrostatic recording head. FIGS. 18 and 19 are explanatory diagrams showing the connection parts, and FIGS. 23 is an explanatory diagram showing a means for moving a short ion current generating type electrostatic recording head, and Figures 23+a) and (b) show the positional relationship between the short ion current generating type electrostatic recording head and the photoreceptor belt. Explanatory diagram, 2nd
Figure 4 is an addition jf! 25 is a block diagram of a control circuit that erases an electrostatic latent image based on exposure according to the recording area of additional information. FIG. 26 is a flowchart of the control circuit of FIG. 25. , FIG. 27 is a flowchart of control for neutralizing the charge on the photoreceptor belt by the ion flow generation type electrostatic recording head, and FIG. 28 (al.
, fbl indicates control for dividing and driving the ion flow generation type electrostatic recording head, (al is a block diagram, fbl is an explanatory diagram showing the storage contents of the nonvolatile RAM, and FIGS. 29 to 31 (al, (tel) , (C) is an explanatory diagram of the detection means for detecting the surface potential of the photoreceptor belt, FIGS. Explanatory diagram, Figure 34 (al, (
b), (C) and FIG. 35 are explanatory diagrams and circuit diagrams showing the humidity detection means and its circuit in the additional information recording area, and FIG. An explanatory diagram showing a heater for
From b), FIG. 40 is an explanatory diagram showing means for dehumidifying the additional information recording area, and FIG. 41 is an explanatory diagram showing an ion flow generation type electrostatic recording head. Figures 42 (al, bl, and (C) are explanatory diagrams showing the connection portion between the conventional ion flow generation type electrostatic recording head and the circuit board. Explanation of symbols 1 - 1 body 2-・--・Photoreceptor 3--・・・--Charge corotron 4 ・-
...-m-----Partial static elimination lamp 5----1---Ion current generation type electrostatic recording head 6.6A
, 6B −・−−−−−・−・−・−・−Developer 7−・
−・−・・・−−−1−−Transfer corotron 8−−−−−
・・−・−・Tetak Corotron 9−・−1−−−
−・−・・・Precleaning Corotron 10・−・−
・・−・−・・Cleaner 11・−・−−−1−−−−−・−Platen glass 12
−・−−−−−−−・−Lamp 13−・−・−・・
---Lens 14------------- Paper feed tray 15--
・----1-- Duplex tray 16-
...------1...Ejection tray 17.18.2
0.22----------Conveyance path 19---
−〜−−−−・Fuser 21・−・−−−−−1・・・・Inverter 23−1−
・・−・−・−・−・Sorter 31−・・−・−−−−1−・−・Drive electrode 32・−・・・−・−1−−−
--Control electrode 32a ----1--Ion guide hole 33--Screen electrode 33a--1-- ...-Ion release hole 34.35.36...--...------
- Insulator 37 - - - - - - - - High frequency power supply 3
8-・--1---- Control electrode power supply 39・-
・−・−・−・・−Screen electrode power supply 40・・−・−
・−・−・Control unit 41−・・・・−・−・Potential sensor 70−・−・−
......Console panel 71----1...---
--- Recording paper 71 a, 71 d ---
---Additional information 71b ---・--・-----m-
--- Copy image 711 ---- Printer image 8
0−・−・−・−・・・・−・Plate 81−1−−
・・・・・・・−Side plate 82.83.84.
85------Feed roller 86---m--
・−・−・・Holder 87 −・・−1−−−・−・−Spring 90 ・−・−・−・−・− Printed circuit board 91
．． 123 --- Card edge connector 93 --- Support member 94
−−−−−−−−−−−−・Support plate 96−・・
・−・−・・−・Flexible printed circuit board 97−・−1−−−・−−−1 Electrode patterns 98a, 98b
・・−・・・−・・−Pin 102 −−−−−
--------Connector housing 104--
--- Lever 106 ------11 ------- Pin 10
7 −・・−・−・・・Mounting plate 109 ・−・−
・−・・−・Wire harness 121 −・−・−
・−・・−Pin 130 −−−−−−−−−−−−−−1・Rail 13
1 −・−−−−m−・・・−・Belt 132 ・−
・−・−・−Drive roll 133 −・−・・−・・−Idler roll 150 −・−・・−・−・−Recording paper size 151.152 ・−・・・Write head recording area 1
68 ・−・・−・−・−・−・Light emitting diode 183 ・−・・−・・−・・−・Current detection sleeve 190 ・−・−・−・−・−・− Potential sensor 2
10 -...-...--Ion flow detection opposing sensor 220 -1...--...--Heater 230.2
40 -・・----1----・1 temperature sensor 255
・・−・−・−・・〜・Humidity sensor 256 ・−・
・・−・−・−・−−−−One board 257 ・・−・−
・−・−・−Electrode 258−・・・・−・・Moisture sensitive layer 259−・・−・・−−−−−−1−−Protective layer 26
1 --1--...--1---Resistance layer 272-
・・−・−・−−−−−Sponge 274 −−−・
・−・−−−1−−− Desiccant 282 〜・・・・・・−
・−・−・Dehumidification filter 283 ・−・−・・
−・・Blower fan 290 −・−・−・−・・
-Sponge 291 ・−・−−・−−−−−・
Case 310 ・−・−・・−−−−1−・Drive electrode 320−・・−・−1−−−−・・−Control electrode 3
30 ------- Screen electrode patent applicant Fuji Xerox Co., Ltd. Representative Patent attorney Taira 1) Tadao Figure 2 Figure 3 Figure 4 Figure 8 Figure 9 Figure 1O (a) ぢ(b) Figure 1I (a) 9' and (b)
(C) No. 135 Fig. 14 (a)
(b) Figure 15 (a)
(b); o5) ・10rb 101σ Fig. 20 (a) Fig. 21 Fig. 23 (b) 51A Fig. 26 Fig. 27 (b) Fig. 31 rσ horn' Fig. 32 (b) 25Q Fig. 33 cc? Figure 34(b)
(C) zvb 257 Fig. 35 kc χ γ Z Fig. 36 Fig. 38 Fig. 37 Fig. 39 (a) (b) Fig. 40 Fig. 41

Claims (4)

[Claims] (1) An ion current corresponding to an image signal is generated from an electrostatic recording head to form an electrostatic latent image on a photoreceptor or dielectric electrostatic latent image forming body, and this is developed, transferred, and fixed. An ion flow generation type electrostatic recording device that records an image on a recording medium using a plurality of first connection members connected to each electrode of the electrostatic recording head, a power supply circuit formed in a circuit board, and a drive circuit. A connection between an ion flow generating electrostatic recording head and a circuit board, characterized in that it is composed of a plurality of second connection members that are connected to a circuit or the like and make line or surface contact with the first connection member. Device. (2) The first connection member is constituted by an electrode pattern formed on a support plate located in a plane parallel to a direction perpendicular to the ion emitting surface of the electrostatic recording head, and the second connection member The ion flow generation type electrostatic recording head according to claim 1, wherein the ion flow generation type electrostatic recording head is constituted by a connecting terminal material provided on a card edge connector that fits with the support plate having the electrode pattern. and a connection device between the circuit board and the circuit board. (3) The first connecting member is composed of a pin terminal formed upright on the electrostatic recording head, and the second connecting member is composed of a connecting terminal material that is male-femally coupled to the pin terminal. A connection device between an ion flow generation type electrostatic recording head and a circuit board according to claim 1. (4) The first connection member is formed on a support plate located on a surface parallel to the ion emitting surface of the electrostatic recording head, and is constituted by an electrode pattern having connection holes at predetermined positions; 2. The ion flow generating electrostatic device according to claim 1, wherein the second connecting member is a spring contact pin whose tip is inserted into the connection hole of the electrode pattern and maintains electrical contact by elastic force. A connection device between the recording head and the circuit board.