JP2013164964A - Neutralization apparatus, and image forming apparatus including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a neutralization apparatus which can reduce unevenness in the amount of light applied to the photoreceptor surface, while decreasing the number of LEDs being arranged, and can minimize reduction in the amount of light applied to the photoreceptor surface.SOLUTION: A concave lens 83c diverges the emission light from each LED 82 before impinging on the surface of a photoreceptor drum 13. Consequently, the irradiation range J of each surface of the photoreceptor drum 13, irradiated with the emission light from each LED 82, spreads and the surface of the photoreceptor drum 13 is illuminated with a substantially uniform amount of light, and neutralized substantially uniformly. Unevenness of charges on the surface of the photoreceptor drum 13 is thereby suppressed, and the potential distribution on the surface of the photoreceptor drum 13 can be made substantially uniform. Occurrence of uneven density in a toner image formed on the surface of the photoreceptor drum 13 can thereby be suppressed.

Description

  The present invention relates to a static eliminator that irradiates a photoconductor with light to neutralize the photoconductor, and an image forming apparatus including the same.

  An example of this type of image forming apparatus is an electrophotographic type. In this type of image forming apparatus, once the charge on the surface of the photoconductor is removed, the surface of the photoconductor is uniformly charged, the surface of the photoconductor is scanned with a light beam, and the electrostatic latent image is applied to the surface of the photoconductor. Forming an electrostatic latent image on the surface of the photoconductor, forming a toner image on the surface of the photoconductor, transferring the toner image from the photoconductor to the recording paper, heating and pressurizing the recording paper, It is fixed on the recording paper.

  The charge on the surface of the photoconductor is removed by a static eliminator. This static eliminator removes the charge on the surface of the photoreceptor by light irradiation, and a discharge tube such as a fluorescent lamp or an LED array is used as its light source. In recent years, an LED array has been used for miniaturization and cost reduction. Is frequently used.

  However, when an LED array is used, the light intensity is highest in the optical axis direction of each LED of the LED array, and the light intensity decreases as the distance from the optical axis direction of each LED decreases. Unevenness is likely to occur in the amount of light emitted, which causes charge unevenness on the surface of the photoreceptor. For this reason, as shown in FIG. 6, the number of LEDs 101 arranged in the LED array is increased to reduce unevenness in the amount of light applied to the surface of the photoreceptor.

  In Patent Document 1, a light diffusing plate is installed on the light emitting side of each LED of the LED array, and the light emitted from each LED is diffused by the light diffusing plate and then incident on the surface of the photosensitive member. Unevenness in the amount of light applied is reduced.

Japanese Patent Laid-Open No. 04-284484

  However, if the number of LEDs 101 in the LED array is increased as shown in FIG. 6 to reduce the unevenness of the amount of light applied to the surface of the photoreceptor, the cost of the static eliminator is increased due to the increase in the number of LEDs 101. It became high.

  Also, as in Patent Document 1, when the light emitted from each LED is diffused by the light diffusing plate and then irradiated to the surface of the photoreceptor, the light diffusing effect of the light diffusing plate is low and the unevenness in the amount of light is sufficiently reduced. I couldn't. Alternatively, if the unevenness of the light amount is sufficiently reduced by increasing the degree of light diffusion by the light diffusing plate, the light loss due to the diffusion of the light diffusing plate increases, and the amount of light irradiated on the photoreceptor surface decreases. did.

  Accordingly, the present invention has been made in view of the above-described conventional problems, and can reduce unevenness in the amount of light irradiated on the surface of the photoreceptor while reducing the number of LEDs arranged, and the photoreceptor. An object of the present invention is to provide a static eliminator capable of suppressing a decrease in the amount of light applied to the surface and an image forming apparatus including the static eliminator.

  In order to solve the above-described problems, a static eliminator of the present invention is a static eliminator that includes a plurality of arranged LEDs and irradiates a photoreceptor with light emitted from the LEDs, and includes a cover member that covers the LEDs. The cover member includes a partition portion that partitions the LEDs and a concave lens portion that is disposed in an optical path from the LEDs to the photoconductor.

  In such this invention, since each LED is covered by the cover member and each LED is partitioned by each partition part of the cover member, each LED is not contaminated by dust or the like. In addition, since each concave lens portion of the cover member is arranged in the optical path from each LED to the photoconductor, the light emitted from each LED is diverged by each concave lens portion and incident on a wide range of the photoconductor surface at a substantially uniform level. Thus, the surface of the photoreceptor can be neutralized almost uniformly. As a result, charge unevenness on the surface of the photoconductor can be suppressed, the potential distribution on the surface of the photoconductor can be made substantially uniform, and occurrence of density unevenness in the toner image formed on the surface of the photoconductor can be suppressed. Further, since each concave lens portion has translucency, there is almost no loss of light transmitted through each concave lens portion, and a decrease in the amount of light irradiated on the surface of the photoreceptor can be suppressed. Then, the light emitted from each LED is diverged by each concave lens part and is incident on a wide range of the surface of the photoreceptor at a substantially uniform level, and there is almost no loss of light transmitted through each concave lens part. The number can be further reduced, and the number of parts and the cost can be reduced.

  Further, in the static eliminator of the present invention, the irradiation areas of the light emitted from the LEDs and transmitted through the concave lens portions and irradiated on the photosensitive member overlap each other.

  Even if the light emitted from each LED is diverged by each concave lens portion, the amount of light tends to decrease at the peripheral portion of each light irradiation region irradiated on the photosensitive member. For this reason, the irradiation areas of the respective lights irradiated on the photosensitive member are overlapped with each other to prevent a decrease in the amount of light at the peripheral edge of each irradiation area. As a result, the potential distribution on the surface of the photoreceptor can be made more uniform, and the occurrence of uneven density in the toner image formed on the surface of the photoreceptor can be more effectively suppressed.

  Furthermore, in the static eliminator of the present invention, each concave lens is formed on the light incident surface and the light exit surface of each concave lens portion.

  In this case, the light divergence by each concave lens part becomes high, the irradiation area of each light irradiated to the photosensitive member can be made wider, and the number of LEDs arranged can be further reduced. . Alternatively, the distance from each LED to the photosensitive member can be shortened to reduce the size of the static eliminator, and thus the size of the image forming apparatus.

  On the other hand, an image forming apparatus according to the present invention includes the above-described static eliminator according to the present invention and a photoconductor that is neutralized by being irradiated with each light emitted from each LED and transmitted through each concave lens portion in the static eliminator. I have.

  In such an image forming apparatus of the present invention, the same operational effects as the above-described static eliminator of the present invention are exhibited.

  In the present invention, the LEDs are covered with the cover member, and the LEDs are partitioned by the partition portions of the cover member, so that the LEDs are not contaminated by dust or the like. In addition, since each concave lens portion of the cover member is arranged in the optical path from each LED to the photoconductor, the light emitted from each LED is diverged by each concave lens portion and incident on a wide range of the photoconductor surface at a substantially uniform level. Thus, the surface of the photoreceptor can be neutralized almost uniformly. As a result, charge unevenness on the surface of the photoconductor can be suppressed, the potential distribution on the surface of the photoconductor can be made substantially uniform, and occurrence of density unevenness in the toner image formed on the surface of the photoconductor can be suppressed. Further, since each concave lens portion has translucency, there is almost no loss of light transmitted through each concave lens portion, and a decrease in the amount of light irradiated on the surface of the photoreceptor can be suppressed. Then, the light emitted from each LED is diverged by each concave lens part and is incident on a wide range of the surface of the photoreceptor at a substantially uniform level, and there is almost no loss of light transmitted through each concave lens part. The number can be further reduced, and the number of parts and the cost can be reduced.

1 is a cross-sectional view illustrating an image forming apparatus to which an embodiment of a static eliminator of the present invention is applied. FIG. 2 is an enlarged cross-sectional view illustrating a printing unit in the image forming apparatus of FIG. 1. It is a perspective view which partially fractures | ruptures and shows the static elimination apparatus of this embodiment. It is sectional drawing which expands and shows the static elimination apparatus of FIG. It is sectional drawing which expands and shows the concave lens of the static elimination apparatus of FIG. It is a perspective view which shows an example of the conventional static elimination apparatus.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a cross-sectional view showing an image forming apparatus to which an embodiment of the static eliminator of the present invention is applied. The image forming apparatus 1 is a multifunction machine having a copying function, a facsimile function, a printer function, a scanner function, and the like, and includes a document reading device 2, a printing unit (printer) 3, a paper feeding unit 4, and the like.

  The image data handled in the image forming apparatus 1 corresponds to a color image using each color of black (K), cyan (C), magenta (M), yellow (Y), or a single color (for example, black). This corresponds to the monochrome image used. For this reason, in the printing unit 3, the developing device 12, the photosensitive drum 13, the drum cleaning device 14, the charging device 15, and the charge eliminating device 16 are each provided to form four types of toner images corresponding to the respective colors. The four image stations Pa, Pb, Pc, and Pd are configured in association with black, cyan, magenta, and yellow, respectively.

  FIG. 2 is an enlarged cross-sectional view showing one image forming station of the printing unit 3. As shown in FIG. 2, in any of the image stations Pa, Pb, Pc, and Pd, a drum cleaning device 14, a charge eliminating device 16, a charging device 15, and a developing device 12 are disposed around the photosensitive drum 13. As the photosensitive drum 13 rotates, processing by the devices 14, 16, 15, and 12 is sequentially performed. The drum cleaning device 14 removes and collects residual toner on the surface of the photosensitive drum 13. The static eliminator 16 removes the charge on the surface of the photosensitive drum 13. The charging device 15 uniformly charges the surface of the photosensitive drum 13 to a predetermined potential. Thereafter, an electrostatic latent image is formed on the surface of the photosensitive drum 13 by the optical scanning device 11 (shown in FIG. 1). This optical scanning device 11 is a laser scanning unit (LSU) provided with a laser diode and a reflection mirror. The surface of each charged photosensitive drum 13 is exposed according to image data, and image data is formed on those surfaces. A corresponding electrostatic latent image is formed. The developing device 12 develops the electrostatic latent image on the surface of the photosensitive drum 13 to form a toner image on the surface of the photosensitive drum 13. As a result, toner images of the respective colors are formed on the surfaces of the photosensitive drums 13 of the image stations Pa, Pb, Pc, and Pd.

  Subsequently, each color toner image is sequentially transferred onto the surface of each photosensitive drum 13 and superimposed on the intermediate transfer belt 21 to form a color toner image on the intermediate transfer belt 21.

  As shown in FIG. 1, the intermediate transfer belt device 22 is disposed above each photosensitive drum 13, and includes an intermediate transfer belt 21, a belt driving roller 23, a driven roller 24, four intermediate transfer rollers 25, and belt cleaning. The device 26 is provided.

  The belt driving roller 23, the driven roller 24, each intermediate transfer roller 25, and the like stretch and support the intermediate transfer belt 21, and rotate the intermediate transfer belt 21 in the direction of arrow C. Each intermediate transfer roller 24 is rotatably supported in the vicinity of the intermediate transfer belt 21 and is pressed against the respective photosensitive drums 13 via the intermediate transfer belt 21, so that the intermediate transfer belt 21 and the respective photosensitive drums 13 are connected. Each nip area is formed in between. Further, a high-voltage transfer bias (a high voltage having a polarity (+) opposite to the toner charging polarity (-)) is applied to each intermediate transfer roller 24 in order to transfer the toner image. Each intermediate transfer roller 24 sequentially superimposes and transfers the toner image on the surface of each photosensitive drum 13 onto the intermediate transfer belt 21, and forms a toner image of each color on the intermediate transfer belt 21.

  In this way, the toner images of the respective colors on the surfaces of the photosensitive drums 13 are stacked on the intermediate transfer belt 21. The toner images of the respective colors are conveyed together with the intermediate transfer belt 21 to a nip area between the intermediate transfer belt 21 and the transfer roller 31a of the secondary transfer device 31. The transfer roller 31a of the secondary transfer device 31 has a voltage for transferring the toner image of each color on the intermediate transfer belt 21 onto a recording sheet (a high voltage having a polarity (+) opposite to the toner charging polarity (-)). Is applied. The transfer roller 31a transfers each color toner image on the intermediate transfer belt 21 onto a recording sheet, and forms a color toner image on the recording sheet.

  Further, the toner image of each color on the intermediate transfer belt 21 may not be completely transferred onto the recording paper by the secondary transfer device 31, and the toner may remain on the intermediate transfer belt 21. Therefore, residual toner is removed and collected by the belt cleaning device 26.

  The recording sheet is conveyed to the fixing device 33 after the color toner image is transferred in the nip area between the intermediate transfer belt 21 and the transfer roller 31 a of the secondary transfer device 31. The fixing device 33 includes a heating roller 34, a pressure roller 35, and the like, and sandwiches and conveys a recording sheet between the heating roller 34 and the pressure roller 35. The heating roller 34 is controlled so as to have a predetermined fixing temperature, and by thermally pressing the recording paper together with the pressure roller 35, the color toner image transferred to the recording paper is melted, mixed, and pressed, Heat fixing to recording paper.

  On the other hand, the paper feed cassette 41 of the paper feed unit 4 is provided in the lower part of the image forming apparatus 1 and supplies the recording paper in the paper feed cassette 41. The manual feed tray 42 is a tray for placing recording paper, and is provided on the side wall of the image forming apparatus 1 to supply the recording paper in the tray.

  The printing unit 3 conveys an S-shaped sheet for feeding recording paper supplied from the paper feed cassette 41 or the manual feed tray 42 to the paper discharge tray 43 via the secondary transfer device 31 and the fixing device 33. A path S is provided, and along the sheet transport path S, a registration roller 44, a fixing device 33, a transport roller 45, a paper discharge roller 46, and the like are arranged.

  A paper pickup roller 47 is provided at the end of the paper feed cassette 41, and the recording paper is pulled out from the paper feed cassette 41 one by one by the paper pickup roller 47 and conveyed to the paper conveyance path S. In addition, a pickup roller 48 is provided at the end of the manual feed tray 42, and recording paper is pulled out from the manual feed tray 42 one by one by the pickup roller 48 and sent out to the paper transport path S.

  The conveyance rollers 45 are small rollers for promoting and assisting conveyance of the recording paper, and a plurality of sets are provided. The registration roller 44 temporarily stops the recording paper that has been conveyed, aligns the leading edge of the recording paper, and is on the intermediate transfer belt 21 in the nip area between the intermediate transfer belt 21 and the transfer roller 31a of the secondary transfer device 31. The recording paper is conveyed with good timing in accordance with the rotation of the respective photosensitive drums 13 and the intermediate transfer belt 21 so that the toner images of the respective colors are transferred onto the recording paper.

  Further, the recording paper is fixed with a color toner image by the fixing device 33, passes through the fixing device 33, and is then discharged face down onto the paper discharge tray 43 by the paper discharge roller 46.

  When printing not only on the front side of the recording paper but also on the back side, the recording paper is transported by the paper discharge roller 46, and then the paper discharge roller 46 is stopped and then reversely rotated, so that the recording paper is reversed. , The recording paper is turned upside down, the recording paper is guided to the registration roller 44, and the image is recorded and fixed on the back surface of the recording paper in the same manner as the front surface of the recording paper. To discharge.

  Next, the document reading device 2 mounted on the upper body of the image forming apparatus 1 will be described. In the document reading device 2, the document transport unit (ADF) 52 is pivotally supported on the back side of the document reading unit 53 by a hinge (not shown), and is opened and closed by moving the front portion up and down. The When the document transport unit 52 is opened, the platen glass 54 of the document reading unit 53 is opened, and a document sheet is placed on the platen glass 54.

  The document reading unit 53 includes a platen glass 54, a first scanning unit 55, a second scanning unit 56, an imaging lens 57, a CCD (Charge Coupled Device) 58, and the like. The first scanning unit 55 illuminates the surface of the original paper on the platen glass 54 with the light source 61 while moving in the sub-scanning direction by a distance corresponding to the size of the original paper, and the reflected light is reflected by the first reflecting mirror 62. Reflected and guided to the second scanning unit 56. The second scanning unit 56 follows the first scanning unit 55 and reflects the reflected light from the original paper by the second and third reflecting mirrors 63 and 64 and guides it to the imaging lens 57. The imaging lens 57 focuses the reflected light from the original paper on the CCD 58 and forms an image on the original paper surface on the CCD 58. The CCD 58 repeatedly scans the image on the surface of the original paper in the main scanning direction, and outputs an analog image signal of one main scanning line each time.

  The document reading unit 53 can read not only a stationary document but also an image on the surface of the document sheet conveyed by the document conveying unit 52. In this case, as shown in FIG. 1, the first scanning unit 55 is moved to a reading position below the original reading glass 65, and the second scanning unit 56 is positioned in accordance with the position of the first scanning unit 55. Then, the document conveying unit 52 starts conveying the document paper.

  In the document transport unit 52, the pickup roller 71 is pressed against and rotated on the document sheet on the document tray 72, the document sheet is pulled out, the document sheet is transported through the sheet transport path 73, and the document sheet is read by the document reading unit 53. The sheet is passed over the glass 65 and further conveyed from the sheet discharge roller 75 to the sheet discharge tray 76.

  When transporting the original paper, the light source 61 of the first scanning unit 55 illuminates the original paper surface through the original reading glass 65, and the reflected light from the original paper is reflected by the first and second scanning units 55 and 56. The light is guided to the imaging lens 57 by the mirror, and the reflected light from the original paper is condensed on the CCD 58 by the imaging lens 57, and the image on the original paper surface is formed on the CCD 58, thereby reading the image on the original paper surface. .

  When reading the back side of the original paper, the intermediate tray 77 is rotated as indicated by the dotted line around the axis, and the paper is discharged while the original paper is being discharged from the paper discharge roller 75 to the paper discharge tray 76. The roller 75 is stopped, the original paper is received on the intermediate tray 77, the paper discharge roller 75 is rotated in the reverse direction, and the original paper is guided to the paper conveyance path 73 via the reverse conveyance path 78, so Is reversed, the image on the back side of the original paper is read in the same manner as the image on the front side of the original paper, the intermediate tray 77 is returned to the original position indicated by the solid line, and the original paper is discharged from the discharge roller 75 to the discharge tray 76. To do.

  The original paper image read by the CCD 58 is output as an analog image signal from the CCD 58, and the analog image signal is A / D converted into a digital image signal. The digital image signal (image data) is subjected to various image processing and then input to the optical scanning device 11 of the image forming apparatus 1, and an image indicated by the image data is recorded on a recording sheet by the printing unit 3. This recording sheet is output.

  Next, the structure of the static elimination apparatus 16 of this embodiment is demonstrated in detail. FIG. 3 is a perspective view showing the static eliminator 16 of the present embodiment partially cut away. FIG. 4 is an enlarged cross-sectional view of the static eliminator 16.

  As shown in FIGS. 3 and 4, the static eliminator 16 includes a substrate 81 extending in the longitudinal direction (main scanning direction) of the photosensitive drum 13 and a plurality of arrays arranged in the main scanning direction at intervals on the substrate 81. LED 82, a transparent cover 83 covering each LED 82, and a light shielding member 84.

  Here, each LED 82 is mounted on the substrate 81 so that the optical axis of each LED 82 is parallel to the mounting surface of the substrate 81, and the optical axis of each LED 82 is directed in the axial direction of the photosensitive drum 13. Each LED 82 is of a board mounting type. Further, for example, the number of the LEDs 82 is 12, and the arrangement interval of the LEDs 82 is 30 mm.

  The transparent cover 83 is attached and fixed to the substrate 81 and the light shielding member 84 in a state of covering each LED 82. The transparent cover 83 is an integral one formed by molding a transparent synthetic resin, and the side wall plate 83a facing the mounting surface of the substrate 81, a plurality of partition plates 83b that partition each LED 82, and the optical axis of each LED 82 pass through. A plurality of concave lens portions 83c. Since each LED 82 mounted on the mounting surface of the substrate 81 is sealed by the side wall plate 83a, each partition plate 83b, each concave lens portion 83c, and the light shielding member 84, dust and toner in the image forming apparatus 1 adhere to each LED 82. Never do.

  In addition, each concave lens portion 83 c is disposed in the optical path from each LED 82 to the photosensitive drum 13. Therefore, the light emitted from each LED 82 passes through each concave lens portion 83 c and enters the photosensitive drum 13 to irradiate the surface of the photosensitive drum 13. Thereby, the surface of the photosensitive drum 13 is neutralized.

  As shown in FIG. 4, each concave lens portion 83 c diverges the light emitted from each LED 82 and then enters the surface of the photosensitive drum 13. For this reason, each irradiation area J on the surface of the photosensitive drum 13 irradiated with the light emitted from each LED 82 is expanded, and there is a difference between the light intensity in the optical axis direction of each LED 82 and the light intensity in the direction away from the optical axis direction. As a result, the surface of the photosensitive drum 13 is illuminated with a substantially uniform amount of light, and the surface of the photosensitive drum 13 can be neutralized substantially uniformly. As a result, the electric charge unevenness on the surface of the photosensitive drum 13 can be suppressed, the electric potential distribution on the surface of the photosensitive drum 13 can be made substantially uniform, and the density unevenness of the toner image formed on the surface of the photosensitive drum 13 can be generated. Can be suppressed.

  Further, since each concave lens portion 83c has translucency, there is almost no loss of light transmitted through each concave lens portion 83c, and a decrease in the amount of light irradiated on the surface of the photosensitive drum 13 can be suppressed. The light emitted from each LED 82 is diffused by each concave lens portion 83c, the surface of the photosensitive drum 13 is illuminated with a substantially uniform light amount, and there is almost no loss of light transmitted through each concave lens portion 83c. Even if the number of arrays is reduced, the surface of the photosensitive drum 13 can be illuminated with a sufficient amount of light, and the number of parts and cost can be reduced.

  Further, even if the light emitted from each LED 82 is diverged by each concave lens portion 83c, the amount of light tends to decrease at the peripheral portion of each light irradiation region J irradiated on the surface of the photosensitive drum 13. For this reason, the peripheral portions of the respective irradiation regions J of the light irradiated on the surface of the photosensitive drum 13 are overlapped with each other to suppress a decrease in the amount of light at the peripheral portions of the respective irradiation regions J. As a result, the potential distribution on the surface of the photosensitive drum 13 can be made more uniform, and the occurrence of uneven density in the toner image formed on the surface of the photosensitive drum 13 can be more effectively suppressed.

  Further, the light incident surface 83d and the light exit surface 83e of each concave lens portion 83c form a concave lens. Here, as shown in FIG. 5, the radius of curvature R1 of the light incident surface 83d is made smaller than the radius of curvature R2 of the light emitting surface 83e.

  As described above, if both the light incident surface 83d and the light exit surface 83e of each concave lens portion 83c are concave lenses, the light divergence by each concave lens portion 83c is increased, and the photosensitive drum 13 to which the emitted light from each LED 82 is irradiated. Each irradiation area J on the surface is further expanded, and the number of LEDs 82 arranged can be further reduced. Alternatively, the distance from each LED 82 to the surface of the photosensitive drum 13 can be shortened while appropriately maintaining the respective irradiation regions J on the surface of the photosensitive drum 13, so that the static eliminator 16 can be downsized and extended. The image forming apparatus 1 can be downsized.

  In the above embodiment, each of the light incident surface 83d and the light exit surface 83e of each concave lens portion 83c is a concave lens, but only one of the light incident surface 83d and the light exit surface 83e may be a concave lens. Absent.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. It is understood.

DESCRIPTION OF SYMBOLS 1 Image forming apparatus 2 Original reading apparatus 3 Printing part 4 Paper feeding part 11 Optical scanning apparatus 12 Development apparatus 13 Photosensitive drum 14 Drum cleaning apparatus 15 Charging apparatus 16 Static elimination apparatus 21 Intermediate transfer belt 22 Intermediate transfer belt apparatus 25 Intermediate transfer roller 26 Belt cleaning device 31 Secondary transfer device 33 Fixing device 41 Paper feed cassette 52 Document transport unit 53 Document reading unit 81 Substrate 82 LED
83 Transparent cover (cover member)
83a Side wall plate 83b Partition plate (partition part)
83c Concave lens portion 83d Light incident surface 83e Light exit surface 84 Light blocking member

Claims (4)

A static eliminator comprising a plurality of LEDs arranged, and irradiating the photoreceptor with the emitted light of each LED,
A cover member covering each of the LEDs;
The static eliminator, wherein the cover member includes a partition portion for partitioning the LEDs, and a concave lens portion disposed in an optical path from the LEDs to the photoconductor. It is a static elimination apparatus of Claim 1, Comprising:
The static eliminator characterized in that the irradiation areas of the light emitted from the LEDs and transmitted through the concave lens portions and irradiated on the photosensitive member overlap each other. The static eliminator according to claim 1 or 2,
The static eliminator, wherein each concave lens is formed on a light incident surface and a light output surface of each concave lens portion.   A static eliminator according to any one of claims 1 to 3, and a photoconductor that is neutralized by being irradiated with each light emitted from each LED and transmitted through each concave lens portion in the static eliminator. An image forming apparatus.

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