JPH11149231A - Recording device - Google Patents

Abstract

(57) [Summary] An apparatus can be miniaturized by exposing a photosensitive member from the inside. Therefore, the photosensitive member is formed based on the transparent member, and the exposing device is provided inside by making the flange portions at both ends of the photosensitive member hollow. A photoconductive layer is provided on an outer periphery of a cylinder portion made of a transparent member. Hollow flanges 14 are provided at both ends of the cylinder 11, and an exposing device or the like is disposed inside the flange 14, and the cylinder 11 is exposed from the inside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus having a photoconductive layer provided on the outer periphery of a cylinder section made of a transparent member and performing exposure from the inside thereof, and more particularly to a recording apparatus for fastening a cylinder section and a flange section. The present invention relates to simplification and prevention of damage to a cylinder portion.

[0002]

2. Description of the Related Art A photoreceptor is exposed from the outside to form an electrostatic latent image on the photoreceptor surface, and the formed electrostatic latent image is developed to form a toner image. In a recording apparatus for transferring the photoconductor onto a recording paper, the photoconductor is formed of a metal material such as an aluminum alloy, and as shown in FIG.
The cylinder portion 11 is fastened by screws 50 at several places from the outer peripheral portion of the flange portion 14.

Here, since it is preferable that the photoconductor is securely grounded, for example, in a resin flange for an electrophotographic photoconductor disclosed in Japanese Unexamined Patent Publication No. 5-204283, the resin flange is fitted into the base trunk of the photoconductor. At this time, the resin flange includes a conductive member, and a part of the conductive member is protruded so as to penetrate the expectations of the photoconductor, and the conductive member is electrically connected to the support shaft of the photoconductor. Make contact.

[0004]

However, in order to expose the photoreceptor from the outside, an exposing device is required outside the photoreceptor. Therefore, when the apparatus is downsized, it is better to expose the photoreceptor from the inside. good.

When the photosensitive member is exposed from the inside,
Since the photoreceptor needs to transmit light, a transparent electrode layer is provided on the surface of the cylinder portion made of transparent glass or transparent plastic, and further, an optical electrode layer is provided thereon to form the photoreceptor. Here, when the glass cylinder is fastened with a screw, the cylinder is easily damaged by the stress applied to the tip of the screw, and when the plastic cylinder is fastened with a screw, the cylinder is likely to be deformed. there were.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks. The present invention makes it possible to expose a photoreceptor from the inside, supports the cylinder at both ends of the cylinder, and rotates the photosensitive member. It is an object of the present invention to facilitate attachment and detachment of a cylinder portion from a flange portion that transmits power, and to prevent damage to the cylinder portion.

[0007]

According to the recording apparatus of the present invention, a photoconductive layer is provided on the outer periphery of a cylinder made of a transparent member, hollow flanges are provided at both ends of the cylinder, and the inside of the flange is provided. An exposure device or the like is arranged in the device to perform exposure from inside the cylinder portion.

Further, the flange portion is provided with two or more slits at equal intervals in a portion for holding the cylinder portion, so that the diameter of the portion of the flange portion for holding the cylinder can be changed according to the diameter of the cylinder portion. I made it.

Further, the flange portion is provided with a convex portion which is smaller in inner diameter than the outer diameter of the cylinder portion and is long in the circumferential direction, so that the cylinder portion and the flange portion do not move in the thrust direction with respect to each other.

A step is provided inside the flange, and a side end of the cylinder is pressed against the step, so that the cylinder and the flange do not move in the thrust direction with respect to each other.

Further, the flange portion has a circumferentially long recess in the outer peripheral portion, and a fastening member for fastening the flange portion from outside is provided in the recess, and the cylinder portion is gripped by fastening the fastening member. Hold the cylinder part securely.

Further, the flange portion has a tapered portion at an end thereof, a ring-shaped fastening member for fastening the tapered portion from the outside is provided, and the cylinder portion is gripped by fastening the fastening member.

Further, the flange portion is made of metal and has good conductivity.

The flange is made of a conductive plastic.

Further, the space between the flange portion and the cylinder portion is filled with a conductive paste to further increase the conductivity.

Further, the cylinder portion has a concave portion or a convex portion which is long in the thrust direction, and the flange portion has a convex portion or a concave portion which is long in the thrust direction, and the concave portion or the convex portion of the cylinder portion and the convex portion or the concave portion of the flange portion. To restrict the movement in the rotation direction.

Further, the cylinder portion has a key-shaped concave portion or a convex portion, and the flange portion has a key-shaped convex portion or a concave portion. The concave portion or the convex portion of the cylinder portion and the convex portion or the concave portion of the flange portion are fitted. In addition, the movement in the rotation direction was restricted.

Further, the flange portion has a driving force transmitting portion, and transmits the driving force transmitted via the driving force transmitting portion to the cylinder portion.

Further, the driving force transmitting section transmits a driving force in the form of a gear.

The driving force transmitting section has a pulley shape and transmits the driving force by friction.

Further, the driving force transmitting section has a timing belt pulley shape.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The recording apparatus according to the present invention relates to a recording apparatus employing a method of exposing a photosensitive member having a photoconductive layer provided on the outer periphery of a cylinder portion made of a transparent member from the inside thereof, and in particular, This facilitates attachment and detachment of the cylinder portion and prevents breakage of the cylinder.

The recording apparatus of the present invention has a photoreceptor, a developing unit, an LED array exposing unit, a transfer roller, and a flange. The photoreceptor has a transparent electrode layer provided on the surface of a cylinder made of transparent glass or transparent plastic, and further has a photoelectrode layer provided thereon. The developing device is arranged to face the photoconductor. The developing device includes a magnetic roller and a non-magnetic conductive sleeve, and supplies toner to the photoconductor by rotation of the sleeve to form a toner image on the photoconductor. L
The ED array exposure device is arranged inside the photoconductor, and exposes the photoconductor from the inside. The transfer roller is applied with a voltage having a characteristic opposite to that of the toner, and transfers the toner image on the photoreceptor to recording paper. The flange portions have a hollow shape and are provided at both ends of the cylinder portion. As described above, since the inside of the flange portion is hollow and the LED array exposure device and the like can be provided inside the flange portion, the LED array exposure device and the like can be provided at the center of the cylinder portion.

Further, the flange portion is provided with two or more slits having a uniform interval in a portion for holding the cylinder portion, and
The outer peripheral portion has a circumferentially long recess, and a fastening member for fastening the flange portion from the outside is provided in the recess, and the cylinder portion is gripped by fastening the fastening member, so that the holding force of the cylinder portion can be increased. it can. Here, as the fastening member, for example, there is an elastic ring.

Furthermore, if the flange portion is molded from conductive plastic and a gear-shaped drive transmitting portion is provided, and the driving force transmitted via the driving force transmitting portion is transmitted to the cylinder portion, the cylinder portion is provided. And the flange portion can be integrally molded, and the cost can be reduced.

Further, when the space between the flange portion and the cylinder portion is filled with a conductive paste, conduction with the electrode layer of the cylinder portion can be ensured.

Further, a long recess in the thrust direction is provided at both ends of the cylinder portion, a long protrusion in the thrust direction is provided on the flange portion, and the recess portion of the cylinder portion and the protrusion of the flange portion are fitted to each other, and It is better not to move in the direction of rotation.

[0028]

FIG. 1 is a block diagram of a recording apparatus according to the present invention.
As shown in the figure, the recording device includes, for example, a photoconductor 1 and an LED.
It has an array exposing unit 2, a transfer roller 3, and a developing unit 4.

The photosensitive member 1 has a transparent electrode layer 12 on the surface of a cylinder 11 made of transparent glass or transparent plastic.
And a photoelectrode layer 13 is further provided thereon. L
The ED array exposure device 2 is disposed inside the photoconductor 1, and exposes the photoconductor 1 from inside. The developing device 3 is arranged to face the photoconductor 1. The developing device 3 includes a magnetic roller 31 and a non-magnetic conductive sleeve 32. The rotation of the sleeve 32 supplies the toner 33 to the photoconductor 1 to form a toner image on the photoconductor 1. The transfer roller 4 is applied with a voltage having a characteristic opposite to that of the toner 33, and transfers the toner image on the photoconductor 1 to the recording paper 90.

Here, the cylinder portion 11 is provided at both ends thereof.
As shown in FIG. Further, the cylinder portion 11 has a concave portion 111 which is long in the thrust direction, for example, as shown in FIG.

The flange portion 14 is made of, for example, a plastic (conductive plastic) to which a conductive substance is added, and has a hollow shape as shown in FIGS. in this way,
Since the flange portion 14 is made of conductive plastic,
The conduction with the cylinder portion 11 is improved, and the cylinder portion 11 can be grounded via the flange portion 14. Further, since the inside of the flange portion 14 is hollow and the LED array exposure device 2 and the like can be provided inside the flange portion 14, the LED array exposure device 2 and the like can be provided at the center of the cylinder portion 11. it can. The inner diameter of the flange portion 14 on the side where the cylinder portion 11 is inserted is larger than the outer diameter of the cylinder portion, and the inner diameter is smaller than the outer diameter of the cylinder portion 11 halfway. The side end of the cylinder portion 11 is pressed against the portion where the inner diameter of the flange portion 14 changes, thereby suppressing the movement of the cylinder portion 11.

Further, the flange portion 14 is connected to the cylinder portion 11
Two or more slits 141 with equal intervals in the part that holds
The outer peripheral portion is provided with a circumferentially long recess 142, and the recess 142 is provided with a fastening member 143 for fastening the flange portion 14 from outside, and the cylinder portion 11 is gripped by fastening the fastening member 143. . Thereby, the force for holding the cylinder portion 11 can be increased. here,
Examples of the fastening member 143 include an elastic ring.

Further, the flange portion 14 is provided with a drive transmission portion 144 having, for example, a gear shape. By transmitting the driving force transmitted through the driving force transmission unit 144 to the cylinder unit 11, the flange unit 14 can establish electrical continuity with the cylinder 11 unit, and the flange unit having the driving transmission unit 144. 14 can be integrally molded, and the cost can be reduced.

Further, the slit 141 of the flange portion 14
Is filled with the conductive paste 145, and the space between the flange portion 14 and the cylinder portion 11 is filled with the conductive paste 145. Thereby, conduction with the cylinder portion 11 can be more reliably achieved.

Further, the flange portion 14 is provided with a convex portion 146 which is long in the thrust direction, and the concave portion 111 of the cylinder portion 11 and the convex portion 146 of the flange portion 14 are fitted so as not to move in the rotational direction. .

The LED array exposing device 2 is disposed inside the photoconductor 1 as described above, and exposes the photoconductor 2 from inside. The developing device 3 is arranged to face the photoconductor 1. The developing device 3 includes a magnetic roller 31 and a non-magnetic conductive sleeve 32, and supplies the toner 33 to the photoconductor 1 by rotation of the sleeve 32 to form a toner image on the photoconductor 1. The transfer roller 4 is applied with a voltage having a characteristic opposite to that of the toner, and transfers the toner image on the photoconductor 1 to recording paper.

In the above embodiment, the drive transmitting section 144 is formed in a gear shape. However, as shown in FIG. 5, a timing belt pulley may be formed, or a drive pulley may be formed to transmit a driving force by frictional force. May be.

The cylinder portion 11 has a concave portion 111 which is long in the thrust direction as shown in FIG.
11 is fitted to the convex portion 146 of the flange portion 14 so as not to move in the rotational direction, but a key-shaped concave portion 111 is provided in the cylinder portion 11 as shown in FIG. The protrusions 146 may be provided, and by fitting them, the cylinder portion 11 and the flange portion 14 may be prevented from moving in the thrust direction and the rotation direction.

The concave portion 111 is provided in the cylinder portion 11 and the convex portion 146 is provided in the flange portion 14. The convex portion is provided in the cylinder portion 11, the concave portion is provided in the flange portion 14, and these are fitted together. The cylinder portion 11 and the flange portion 14 may not move with each other.

The flange portion 14 is provided with a circumferentially long recess 142 on the outer periphery, and a fastening member 143 for fastening the flange portion 14 from the outside is provided in the recess 142, and the cylinder portion is tightened by the fastening member 143. 11 was held, but as shown in FIG.
An end portion is provided with a tapered portion 147, and the tapered portion 147 is provided.
A ring-shaped tightening member 148 for tightening the cylinder portion 11 from the outside, and holding the cylinder portion 11 by tightening the tightening member 148.

Further, the flange portion 14 may be made of a metal material to increase the conductivity of the flange portion 14.

[0042]

As described above, according to the present invention, the photoconductive layer is provided on the outer periphery of the cylinder portion made of a transparent member, and the flange portions provided at both ends of the cylinder portion are hollow, so that the flange is easily formed. An exposure device or the like can be arranged inside the unit.

Further, since an exposing device or the like is arranged inside the flange portion and exposure is performed from the inside of the cylinder portion using the exposing device, the size of the apparatus can be reduced.

Further, since the flange portion is provided with two or more slits having a uniform interval in a portion for holding the cylinder portion,
The diameter of the flange portion can be changed according to the outer diameter of the cylinder, and in particular, the cylinder portion can be held down even when the outer diameter of the cylinder portion is not a perfect circle.

Further, since the flange portion has a convex portion which is smaller in inner diameter than the outer diameter of the cylinder portion and is long in the circumferential direction, the movement in the thrust direction of the cylinder portion can be restricted.

Further, since a step is provided inside the flange portion and the side end of the cylinder portion is pressed against the step portion, the movement of the cylinder portion in the thrust direction can be restricted.

Further, the flange portion has a circumferentially long recess in the outer peripheral portion, and a fastening member for fastening the flange portion from outside is provided in the recess, and the cylinder portion is gripped by fastening the fastening member. The cylinder portion can be securely fastened, and damage to the cylinder portion can be prevented.

The flange portion has a tapered portion at the end, and a ring-shaped tightening member for tightening the tapered portion from the outside is provided. The cylinder portion is gripped by tightening the tightening member. The parts can be securely fastened and the cylinder part can be prevented from being damaged.

Further, since the flange portion is made of metal,
The conductivity can be increased.

Further, since the flange portion is made of a conductive plastic, the conductivity can be improved and the flange can be easily formed.

Further, since the space between the flange portion and the cylinder portion is filled with the conductive paste, the conductivity can be further improved.

Further, the cylinder portion and the flange portion have a concave portion or a convex portion which is long in the thrust direction, and the concave portion and the convex portion are fitted to each other.

Further, since the cylinder portion and the flange portion have a key-shaped concave portion or convex portion, and the concave portion and the convex portion are fitted to each other, it is possible to restrict the movement in the rotational direction and the thrust direction with respect to each other.

Further, since the flange portion transmits the transmitted driving force to the cylinder portion, the peripheral configuration can be simplified.

Further, since the driving force is received at the gear-shaped portion, the driving force can be transmitted reliably.

Further, since the driving force is received by utilizing the friction at the pulley-shaped portion, the driving force can be transmitted with a simple configuration.

Further, since the driving force is received at the timing belt pulley-shaped portion, the timing belt is used to
The driving force can be transmitted reliably and with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a side view of a photoconductor.

FIG. 2 is a sectional view of a flange portion.

FIG. 3 is a top view of a cylinder unit.

FIG. 4 is a side view of a flange portion.

FIG. 5 is a side view of a flange portion provided with a pulley-shaped driving force transmission portion.

FIG. 6 is a top view of a cylinder section having a key-shaped recess.

FIG. 7 is a sectional view of a flange portion having a tapered end.

FIG. 8 is a side sectional view of a conventional cylinder portion and a flange portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Photoconductor 11 Cylinder part 111 Concave part 12 Transparent electrode layer 13 Photoelectrode layer 14 Flange part 141 Slit 142 Depression 143 Fastening member 144 Driving force transmission part 145 Conductive paste 146 Convex part 147 Tapered part 148 Fastening member 2 LED array Exposure unit 3 Developing unit 4 Transfer roller

Claims (15)

[Claims] 1. A photoconductive layer is provided on the outer periphery of a cylinder portion made of a transparent member, hollow flange portions are provided at both ends of the cylinder portion, and an exposure device or the like is arranged inside the flange portion.
A recording apparatus for performing exposure from inside a cylinder using an exposure device. 2. The recording apparatus according to claim 1, wherein said flange portion is provided with two or more slits at equal intervals in a portion for holding a cylinder portion. 3. The recording apparatus according to claim 1, wherein the flange portion includes a convex portion having a diameter smaller than an outer diameter of the cylinder portion and longer in a circumferential direction inside. 4. A step is provided inside the flange, and a side end of the cylinder is pressed against the step.
The recording device according to any one of the preceding claims. 5. A method according to claim 1, wherein said flange portion has a circumferentially long concave portion on an outer peripheral portion, and a tightening member for tightening the flange portion from outside is provided in the concave portion, and the cylinder portion is gripped by tightening the tightening member. Item 3. The recording device according to Item 2. 6. The flange portion has a tapered portion at an end thereof, a ring-shaped fastening member for fastening the tapered portion from the outside, and a cylinder portion is gripped by fastening the fastening member. 2. The recording device according to 2. 7. The method according to claim 1, wherein the flange is made of metal.
7. The recording apparatus according to any one of claims 1 to 6. 8. The recording apparatus according to claim 1, wherein said flange portion is made of conductive plastic. 9. The recording apparatus according to claim 7, wherein a space between the flange and the cylinder is filled with a conductive paste. 10. The cylinder portion has a long concave portion or convex portion in the thrust direction, the flange portion has a long convex portion or concave portion in the thrust direction, and the concave portion or convex portion of the cylinder portion and the convex portion or concave portion of the flange portion. The recording apparatus according to claim 1, wherein the recording apparatus is fitted to restrict the movement in the rotation direction. 11. The cylinder part has a key-shaped concave part or a convex part, the flange part has a key-shaped convex part or a concave part, and the convex part or the concave part is fitted to the concave part or the convex part of the cylinder part and the flange part. 7. The recording apparatus according to claim 1, wherein the movement in the rotation direction is restricted. 12. The recording apparatus according to claim 1, wherein the flange portion includes a driving force transmitting portion, and transmits the driving force transmitted via the driving force transmitting portion to the cylinder portion. 13. The recording apparatus according to claim 12, wherein the driving force transmission section has a gear shape. 14. The recording apparatus according to claim 12, wherein the driving force transmission section has a pulley shape and transmits the driving force by friction. 15. The recording apparatus according to claim 12, wherein the driving force transmission section has a timing belt pulley shape.