JP3034157B2 - Electrophotographic equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic apparatus in which an apparatus main body is divided into a lower main body and an upper main body in order to facilitate mounting and dismounting of a photosensitive drum.

[0002]

2. Description of the Related Art Since a photosensitive drum of an electrophotographic apparatus deteriorates with use, it needs to be replaced with a new one after use to some extent. For this reason, the photosensitive drum is attached to the apparatus main body so as to be easily detachable. In general, the apparatus main body is divided into a lower main body and an upper main body so that the photosensitive drum can be easily attached and detached, and the upper main body can be swung up with respect to the lower main body.

For this reason, the position of the photosensitive drum with respect to the upper main body and the lower main body is easily shifted. If the position of the photosensitive drum is shifted with respect to the upper body and the lower body, there is a possibility that formation of a good image is hindered. Specifically, the rotation of the photosensitive drum becomes unstable due to the poor engagement between the gear that transmits the driving force generated by the motor to the photosensitive drum and the gear provided on the photosensitive drum, and the jitter in the image is reduced. Occurs. Alternatively, the focus of the light emitted from the exposure device deviates from the surface of the photosensitive drum, and the image is blurred.

In order to transfer a developer image formed on a photosensitive drum onto a recording sheet, a transfer roller for sandwiching the recording sheet together with a photoreceptor is provided in the apparatus main body. If the positional relationship between the two positions deviates from the normal state, the transfer cannot be performed correctly.

[0005]

As described above, in the conventional electrophotographic apparatus, since the photosensitive drum can be freely attached to and detached from the upper body and the lower body, the position of the photosensitive body with respect to the exposing means, the driving means and the transfer roller. Is easy to shift,
There was a problem that the formation of a good image was hindered.

The present invention has been made in view of such circumstances, and an object of the present invention is to keep the position of a photoconductor relative to an exposure unit, a driving unit, and a transfer roller constant. An object of the present invention is to provide an electrophotographic apparatus capable of always forming a good image.

[0007]

In order to achieve the above object, the present invention provides an exposure device such as an exposure device for generating light corresponding to an image, and a drive gear for supplying a rotational force. And a first supporting means for supporting the driving means, for example, a driving system supporting member, and driven by a rotational force supplied from the driving means, and statically driven by light emitted from the exposing means. A photosensitive member such as a photosensitive drum on which an electrostatic latent image is formed, and second support means such as a unit plate for supporting the photosensitive member by supporting both ends of a rotation shaft of the photosensitive member. The second support means is provided in contact with the first support means in a state of being attached to the apparatus main body, so that a predetermined first direction orthogonal to the axial direction of the rotation shaft is provided. One A first positioning portion, such as a contact portion, for restricting a position of a predetermined first end of the rotating shaft to a predetermined position with respect to the driving means; A process unit having a second positioning portion such as a contact portion that restricts the position of the rotation axis in the first direction to a predetermined position with respect to the exposure device by contacting the exposure device; A predetermined recording sheet is provided between the photoconductor and a developing unit such as a developing device that forms a developer image on the photoconductor by attaching a developer to the photoconductor in accordance with the electrostatic latent image. Transfer means such as a transfer device for transferring the developer image formed on the photosensitive member by the developing means to the recording paper, having a transfer roller for nipping;
The transfer roller is supported, and both ends of the rotating shaft are inserted in a state where the process unit is mounted on the apparatus main body, respectively, so that the both ends are orthogonal to the axis direction of the rotating shaft and A position of the rotation axis in a predetermined second direction intersecting with the first direction is restricted to a predetermined position with respect to the transfer roller, and one of the second ends is opposite to the first end of the rotation shaft. A pair of, for example, U-shaped members that regulate the position of the portion in the first direction with respect to the transfer roller at a predetermined position, and the other does not regulate the position of the first end of the rotating shaft in the first direction. A third member such as a support member having a groove portion such as a groove formed therein;
Support means.

[0008]

By taking such measures, the photoreceptor has a predetermined second end on the rotation axis thereof in a predetermined first direction and a predetermined first direction formed by a groove provided in the support member.
In each of the second directions intersecting the direction, the position is regulated to a predetermined position with respect to the transfer roller. A first end of the rotating shaft opposite to the second end is inserted into another groove provided in the third support means, but the position of the first end is determined only by the groove in the second direction. It is regulated and the first direction is not regulated. The position of the first end in the first direction is regulated to a predetermined position with respect to the driving means by the first positioning portion abutting on the first support means. Further, the position of the rotation axis in the first direction is regulated to a predetermined position with respect to the exposure unit by the second positioning unit abutting on the exposure unit.

Therefore, the position of the photosensitive member in the second direction is reliably regulated by the pair of grooves formed in the third support means, and the position in the first direction is determined by the exposure means.
The driving means and the transfer roller are reliably restricted to predetermined positions.

[0010]

FIG. 1 is a cross-sectional view showing the overall configuration of a facsimile apparatus equipped with an electrophotographic apparatus.

In the figure, reference numeral 1 denotes an apparatus main body,
It comprises a lower body 2 that forms a housing with an open upper surface and an upper body 3 that forms a housing with an open lower surface. The upper main body 3 is attached to the lower main body 2 so as to be rotatable up and down by a shaft (not shown), and opens and closes the upper surface of the lower main body 2 as shown in FIG.

The lower body 2 includes a process unit 10
0, transfer device 102, fixing device 103, paper feeding device 104
And a power supply unit 106. The upper main body 3 is provided with an exposure device 101 and a communication device 105.

The process unit 100 includes the photosensitive drum 1
1, the charging device 12, the developing device 13, and the cleaning device 14 are integrally formed, and together with the exposure device 101, a toner image is formed on the photosensitive drum 11 by a so-called Carlson process. The process unit 100 is detachable from the lower main body 2.

The exposure apparatus 101 includes an elongated exposure apparatus main body 4.
5, an LED array (not shown) in which a plurality of LEDs are arranged in series, and a rod lens array (not shown). Light emitted from the LED array according to an image signal is passed through the rod lens array to the photosensitive drum. 11
To the photosensitive surface.

The exposure apparatus 101 is arranged inside the upper main body 3 in parallel with the photosensitive drum 11. That is, when the upper main body 3 is rotated downward and closed, it is arranged so as to be located above the photosensitive drum. Holding brackets 48 are respectively attached to both ends of the arrangement location inside the upper main body 3. Each holding bracket 48 has a shaft 49 extending vertically with the upper body 3 closed, and a shaft 4
9 are provided, respectively. An end of the exposure apparatus main body 45 is fitted and held on the shaft 49 so as to be movable up and down, and is constantly pressed downward by a coil spring 50.

The transfer device 102 has a cylindrical transfer roller 60 disposed in parallel with the photosensitive drum 11, and feeds a recording paper P out of the recording paper P stored in a recording paper tray 107. Transfers the toner image formed on the photosensitive drum 11 to the recording paper supplied by the printer.

The fixing device 103 fixes the toner image transferred to the recording paper.

The communication device 105 optically reads a transmission original and performs photoelectric conversion to generate an image signal.

The power supply unit 106 supplies power to the charging device 12, the developing device 13, and the transfer device 102, and is formed by mounting a high-voltage power supply circuit 62 on a high-voltage power supply substrate 61. At the end of the high-voltage power supply board 61 on the front side of the device, an output variable volume 63 for changing the output to each device is provided.

Next, the process unit 100 will be described in detail with reference to FIG. In FIG. 3, the same parts as those in FIG. 1 are denoted by the same reference numerals.

The process unit 100 includes the photosensitive drum 1
A charging device 12, a developing device 13, and a cooling device 14 are provided along the periphery of the device 1. These photosensitive drums 1
1, the charging device 12, the developing device 13, and the cooling device 14 are supported and integrated by unit plates 15 located on both right and left sides of the process unit 100, respectively.

The photosensitive drum 11 is made of a conductor such as aluminum, and has a photosensitive layer made of a photosensitive conductive material formed on an outer peripheral surface thereof. The photosensitive drum 11
A cylindrical body having a length greater than the maximum width of the recording paper on which an image is to be recorded, and is supported by a drum shaft 16 inserted therein. The photosensitive drum 11 is mounted on the unit plate 15 by supporting the drum shaft 16 on the unit plate 15.

As the charging device 12, a scorotron charging device having a well-known configuration is used. This charging device 12
Is provided with a discharge wire inside the elongated scorotron shield case 12a, and is provided in parallel with the photosensitive drum 11. The charging device 12 uniformly charges the surface of the photosensitive drum 11 to a predetermined potential.

The developing device 13 comprises an apparatus case 21, a toner pack 28, a supply roller 30, a developing roller 31, a developing blade 32, a receiving blade 33, a holding rod 36, a spring member 37, and an auxiliary member 38.

The device case 21 has substantially the same length as the length of the photosensitive drum 11 and is arranged in parallel with the photosensitive drum 11. Inside the device case 21, a toner reservoir 22, the toner reservoir 22 and the photosensitive drum 11
And a roller arrangement portion 23 located between the two. The toner storage section 22 and the roller arrangement section 23 are in communication with each other.

The apparatus case 21 is formed with a rectangular toner inlet 24 whose upper surface is opened along the axial direction of the photosensitive drum 11. A flange 25 is provided at a portion of the apparatus case 21 surrounding the toner inlet 24, and a seal member 27 made of sponge or the like is provided on the upper surface of the flange 25 so as to surround the toner inlet 24. Further, the toner input port 24 of the flange 25
Ribs 26 are formed on both sides along the longitudinal direction.

The toner pack 28 is formed by forming a synthetic resin into a rectangular parallelepiped having a plane substantially the same size as the toner input port 24, and has a toner discharge port 29 formed along the longitudinal direction on the lower surface. . The inside of the toner pack 28 is filled with toner (not shown), and the toner outlet 29 is sealed with a seal sheet (not shown) made of a resin film.

The toner pack 28 is mounted on the upper part of the toner case 24 of the apparatus case 21 so as to be detachable. In order to detachably attach the toner pack 28 to the apparatus case 21, although not shown, for example, a nail is formed on the toner pack 28,
There is a configuration in which an engagement portion is formed in the device case 21 such that the pawl is removably engaged.

On the other hand, the roller arrangement portion 23 of the device case 21
Is provided with a supply roller 30, a developing roller 31, a developing blade 32, and a receiving blade 33.

The supply roller 30 is made of a synthetic resin and is fixed to a roller shaft 34. The developing roller 31 is made of a synthetic resin, and is fixed to a roller shaft 35. The roller shafts 34 and 35 are rotatably supported on the side walls of the device case 21, respectively. The developing roller 31
It is in contact with the supply roller 30 and the photosensitive drum 11.

The supply roller 30 and the developing roller 31
It is rotated in a direction indicated by an arrow by a rotation driving mechanism (not shown). The supply roller 30 carries the toner stored in the toner storage section 22 of the apparatus case 21 and
Convey to 1. The developing roller 31 carries the toner supplied from the supply roller 30 and transports the toner to the photosensitive drum 11.

The developing blade 32 is made of a synthetic resin, and is fixed to a holding rod 36. The holding rod 36
With the developing blade 32 down, the developing roller 31
Is arranged in parallel with this on the upper side. Holding rod 36
Are supported on the side wall of the device case 21 so as to be vertically displaceable.

Further, a downward force is applied to the holding rod 36 by a spring member 37. Therefore, the developing blade 32 comes into contact with the surface of the developing roller 31 and the developing roller 3
In addition to thinning the toner carried and transported on 1,
The toner is triboelectrically charged.

The receiving blade 33 is made of, for example, an elastic resin. The receiving blade 33 is provided parallel to the developing roller 31 at a position below the developing roller 31 and close to the photosensitive drum 11. Receiving blade 3
3 has one end attached to the bottom wall of the device case 21 and the other end in contact with the peripheral surface of the developing roller 31.
The receiving blade 33 serves to prevent the toner located in the roller disposition portion 23 from leaking from below the developing roller 31 to the outside of the device case 21 and to serve to prevent the toner dropped below the developing roller 31 from developing roller 31. Has a role of guiding the inside of the device case 21 by the rotation of.

The auxiliary member 38 is disposed between the exposure device 101 and the developing roller 31 along the longitudinal direction of the roller, and is attached to the unit plate 15. That is, the auxiliary member 38 partitions the exposure device 101 and the developing roller 31 from each other. Further, the auxiliary member 38 is grounded when the process unit 100 is mounted on the lower main body 2, and causes the toner escaping from the developing roller 31 to the outside of the developing device 13 by the electrostatic force of the toner. It is adsorbed to.

The cleaning device 14 includes a cleaning blade 39, a waste toner storage tank 40, and a transport roller 4.
1, check valve 42, receiving blade 43 and rib 44
It has. The cleaning blade 39 keeps the photosensitive drum 11 even after the transfer process by the transfer device 102.
Scraping off the remaining toner. Waste toner storage tank 40
Contains the waste toner scraped off by the cleaning blade 39. The waste toner storage tank 40 has an opening formed on the upper surface, and the opening is covered by a lid 40a. The transport roller 41 transfers the waste toner scraped off by the cleaning blade 39 to the waste toner storage tank 40.
Transport to The check valve 42 is connected to the waste toner storage tank 4.
0 prevents the toner inside the photoreceptor drum 11 from flowing back. The receiving blade 43 receives the waste toner scraped off by the cleaning blade 39 and guides the waste toner into the waste toner storage tank 40. The rib 44
The bottom of the waste toner storage tank 40 and the lid 40a are supported. As a result, the rib 44 is warped toward the bottom and the lid 40 a of the waste toner storage tank 40 when the bottom and the lid 40 a of the waste toner storage tank 40 receive the rotational force of the photosensitive drum 11 via the cleaning blade 39 and the receiving blade 43. Is prevented from occurring. The rib 44 is thus provided at the bottom of the waste toner storage tank 40 and the lid 40.
a, the amount of the cleaning blade 39 biting into the photosensitive drum 11 can be reduced.
Factors such as the distance between the cleaning blade 39 and the receiving blade 43 are stably maintained, and the cleaning performance is improved.

Here, the conveying roller 41 is connected to the photosensitive drum 11
And is rotated about its central axis. The backflow prevention valve 42 is attached to the lid 40 a along the longitudinal direction of the transport roller 41, and the lower edge is located above the central axis of the transport roller 41. This is because the transport roller 41 stores the waste toner in the waste toner storage tank 4.
This is to prevent the check valve 42 from obstructing the transfer to zero.

The process unit 1 configured as described above
00 is attached to the lower body 2.

The lower body 2 has a support member 51 for supporting the transfer roller 60, as shown in FIG. The support member 51 is formed with walls 52 and 53 that stand up near both ends of the transfer roller 60. Further, U-shaped grooves 54 and 55 are formed in the walls 52 and 53. The photosensitive drum 1 is inserted into the U-shaped grooves 54 and 55.
One drum shaft 16 is inserted and the process unit 100
Is attached.

By the way, the U-shaped grooves 54 and 55 are
4 (b), the U-shaped groove 54 is shallower than the U-shaped groove 55 as shown in FIG. 4 (c). Therefore, the vertical and horizontal positions of the drum shaft 16 are restricted in the U-shaped groove 54, and only the horizontal position is restricted in the U-shaped groove 55.

FIG. 5 is a cross-sectional view showing the contact state of the lower main body 2, the process unit 100 and the exposure apparatus 101 in a state where the upper main body 3 is rotated downward and closed (the state shown in FIG. 1). .

The side plate members 2b and 2c are fixed to the base member 2a of the lower main body 2 in an upright state. A support member 51 for supporting the process unit 100 is fixed to the side plate members 2a and 2b.

A driven gear 61 is attached to one end of the photosensitive drum 11 provided in the process unit 100. The lower main body 2 is provided with a rotary drive device, and a drive gear 62 constituting a part of the rotary drive device is supported by a drive system support member 62a. The drive system support member 62a is fixed to the base member 2a of the lower main body 2. The upper end of the drive system support member 62a contacts the contact portion 15a formed at the lower end of the unit plate 15.

At the upper end of the unit plate 15, FIG.
As shown in (a), abutting portions 17 projecting horizontally above the photosensitive drum 11 near both side ends of the photosensitive drum 1.
Is provided. On the upper surface of the contact portion 17, positioning pins 18 protruding upward are provided, respectively. As shown in FIG. 6B, the positioning pin 18 has an arc shape corresponding to an arc locus when the exposure apparatus main body 45 moves in accordance with the rotation of the upper main body 3.

On the other hand, stepwise contact portions 46 are formed on the lower surfaces at both ends of the exposure apparatus main body 45, respectively. Each contact portion 46 is at a position where it comes into contact with the contact portion 17 of the unit plate 15 when the upper main body 3 is rotated downward and closed. A positioning hole 47 is provided on the lower surface of each contact portion 46.
Are formed respectively. Each positioning hole 47 is located at a position where it engages with the positioning pin 18.

Thus, when the upper main body 3 is rotated downward, the exposure device 101 moves downward and approaches the photosensitive drum 11. When the upper main body 3 is combined with the lower main body 2 and closed, the lower surfaces of the respective contact portions 46 at both ends of the exposure apparatus main body 45 contact the upper surfaces of the respective contact portions 17 of the unit plate 15.

Each contact portion 46 of the exposure apparatus body 45 is normally urged downward by a coil spring 50. With this biasing, the upper body 3 is closed, and each contact portion 46 is brought into contact with the contact portion 17.
Is prevented by contact with As a result, the exposure apparatus main body 45 is set at a predetermined position at a predetermined distance from the photosensitive drum 11 in accordance with the height of the contact portion 17. That is, the exposure apparatus 101 is positioned with respect to the photosensitive drum 11 provided in the process unit 100 in the vertical direction, that is, in the drum diameter direction.

It should be noted that the upper body 3 is closed with some play to the lower body 2. However, since the exposure apparatus main body 45 is combined with the shaft 49 movably in the up-down direction, this play can be escaped.

When the upper body 3 is combined with the lower body 2 and closed, the contact portions 46 at both ends of the exposure apparatus body 45 are closed.
Abuts against the respective contact portions 17 of the unit plate 15 and at the same time, the positioning holes 47 formed in the respective contact portions 46
It fits into a positioning pin 18 provided in each contact portion 17.
As a result, the exposure apparatus main body 45 is prevented from moving in the horizontal direction, and is positioned relative to the photosensitive drum 11 in the horizontal direction. At this time, since the positioning pin 18 is formed in an arc shape corresponding to an arc locus when the exposure apparatus main body 45 moves in accordance with the rotation of the upper main body 3, the positioning hole 27 is smoothly fitted to the positioning pin 18. Get stuck. When the upper main body 3 is closed in this way, the exposure apparatus main body 45 is accurately positioned with respect to the photosensitive drum 11. The exposure apparatus 101 using an LED array has a depth of focus of, for example, ± 0.1 mm.
According to this embodiment, the focal point of the exposure apparatus 101 can be accurately positioned on the surface of the photosensitive drum 11. The arrangement of the positioning pins 18 and the positioning holes 27 may be reversed.

When the exposure apparatus body 45 comes into contact with the process unit 100 and is pressed by the coil spring 50 as described above, the process unit 100 is also pressed downward. Then one end of the process unit 100
The drum shaft 16 is positioned by contacting the bottom of the U-shaped groove 54 of the support member 51. The other side end of the process unit 100 is configured such that the contact portion 15a on the side of the unit plate 15 as a case of the process unit 100 contacts the drive system support member 62a that supports the drive gear 62 with respect to the side plate member 2a. Is positioned by

Here, the driven gear 61 and the driving gear 62
Are set with reference to the lower end of the contact portion 15a and the upper end of the drive system support member 62a, respectively. Therefore, if the driven gear 61 and the drive gear 62 are engaged with each other when the contact portion 15a contacts the drive system support member 62a, the driven gear 61 and the drive gear 62
They can be engaged with each other with high precision. This driven gear 6
1 and the driving gear 62 are positioned relative to the driven gear 6.
1 is carried out by direct contact between the unit plate 15 supporting the drive gear 1 and the drive system support member 62a supporting the drive gear 62, so that it is carried out extremely accurately. Thereby, the driven gear 61 and the driving gear 62 mesh well. In addition,
The contact of the contact portion 15a with the drive system support member 62a also positions the process unit 100.

The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention.

[0053]

According to the present invention, an exposing means for generating light corresponding to an image, a driving means for supplying a rotational force, a first supporting means for supporting the driving means, The photosensitive member, which is driven by the rotating force supplied from the driving unit, and on which an electrostatic latent image is formed by light emitted from the exposing unit, and which supports both ends of a rotating shaft of the photosensitive member, A second support means for supporting the photoreceptor, and wherein the second support means contacts the first support means in a state where the second support means is mounted on the apparatus main body. A first positioning portion that regulates a position of a predetermined first end of the rotation shaft in a predetermined first direction orthogonal to an axial direction of the rotation shaft to a predetermined position with respect to the driving unit; The dew A process unit having a second positioning portion that restricts the position of the rotation shaft in the first direction to a predetermined position with respect to the exposure device by contacting the photoconductor; A developing unit that forms a developer image on the photoconductor by applying a developer in accordance with an electrostatic latent image; and a transfer roller that sandwiches a predetermined recording sheet between the photoconductor and the developing unit. Transfer means for transferring the developer image formed by the developing means onto the recording paper, and supporting the transfer roller, wherein the process unit is mounted on the apparatus main body. By inserting both ends of the rotation shaft, the position of the rotation shaft in a predetermined second direction orthogonal to the axial direction of the rotation shaft and intersecting with the first direction is set to a predetermined position with respect to the transfer roller. One restricts the position of the second end of the rotating shaft opposite to the first end in the first direction to a predetermined position with respect to the transfer roller, and the other restricts the position of the second end. And a third support unit having a pair of grooves that does not restrict the position of the first end in the first direction on the rotating shaft, so that the position of the photoconductor relative to the exposure unit, the driving unit, and the transfer roller is fixed. , Whereby an electrophotographic apparatus capable of always forming good images can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing the overall configuration of a facsimile apparatus equipped with an electrophotographic apparatus of the present invention.

FIG. 2 is a sectional view showing a state where the upper main body 3 of the facsimile apparatus shown in FIG. 1 is swung up.

FIG. 3 is a sectional view showing a detailed configuration of a process unit 100 in FIG.

FIG. 4 is a view showing a state where the process unit 100 is mounted on the lower main body 2.

FIG. 5 is a cross-sectional view illustrating a contact state of the lower main body 2, the process unit 100, and the exposure apparatus 101.

FIG. 6 is a diagram showing a contact state between a process unit 100 and an exposure apparatus 101.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Apparatus main body 2 ... Lower main body 3 ... Upper main body 100 ... Process unit 101 ... Exposure apparatus 102 ... Transfer apparatus 11 ... Photosensitive drum 12 ... Charging apparatus 13 ... Developing apparatus 12a ... Scorotron shield case 15 ... Unit plate 15a ... Contact Part 17 Contact part 18 Positioning pin 47 Positioning hole 51 Support member 60 Transfer roller 62 Drive gear 62a Drive system support member

──────────────────────────────────────────────────続 き Continued on the front page (72) Chien Sakai, Inventor 3-1-1 Asahigaoka, Hino-shi, Tokyo Inside the Toshiba Hino Plant (72) Inventor Takato Sakai 3-1-1 Asahigaoka, Hino-shi, Tokyo (1) Inside the Toshiba Hino Plant (72) Inventor Satoshi Katagata 3-1-1 Asahigaoka, Hino-shi, Tokyo Inside the Toshiba Hino Plant (56) References JP-A-3-61957 (JP, A) JP JP-A-1-299345 (JP, A) JP-A-3-251857 (JP, A) JP-A-2-140762 (JP, A) JP-A 62-9266 (JP, U) JP-A 63-66847 (JP , U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G03G 15/00 550 G03G 15/04 G03G 15/16 G03G 21/00 350-352 G03G 21/16-21/18

Claims (5)

(57) [Claims] An exposure unit configured to generate light corresponding to an image; a driving unit configured to supply a rotational force; a first support unit configured to support the driving unit; Driven by the rotating force
A photoreceptor on which an electrostatic latent image is formed by light emitted from the exposing unit ;
Be those having a second support means for supporting said photosensitive member by supporting, and the second supporting means, prior
The first support means mounted on the main body of the apparatus;
A predetermined angle perpendicular to the axial direction of the rotation shaft.
A predetermined first end of the rotation axis in the first direction
The position of the drive means is regulated to a predetermined position with respect to the drive means.
1 Positioning part, mounted on the device body
Abutting on the exposure means, the first of the rotating shaft
The position in the direction to a predetermined position with respect to the exposure means
And the process unit is obtained and a second positioning portion for restricting, to attach the developer according to the electrostatic latent image on the photoreceptor
Developing means for forming a developer image on the photoreceptor, and a transfer roller for nipping a predetermined recording sheet between the photoreceptor and the developing means.
And formed on the photoconductor by the developing means.
Transfer means for transferring the developer image onto the recording paper
When, it is one that supports the transfer roller, the apparatus main body
With the process unit attached to the
By inserting both ends of the rotating shaft respectively,
A predetermined first direction orthogonal to the axial direction and intersecting the first direction;
The position of the rotation shaft in two directions is set with respect to the transfer roller.
And at the same time restricting the rotation shaft
In the first direction of the second end opposite to the first end
Relative to the transfer roller at a predetermined position.
And the other is in front of the first end on the axis of rotation.
A pair of grooves that does not regulate the position in the first direction is formed.
An electrophotographic apparatus, comprising: a third supporting means provided in the electrophotographic apparatus. 2. The electrophotographic apparatus according to claim 1, wherein the second positioning means has an engaging means for engaging with the exposure means. 3. An apparatus according to claim 2, wherein said engaging means has one of a concave portion and a convex portion engaging with said concave portion, and said exposing means has the other of said concave portion and said convex portion. Electrophotographic equipment . 4. An electrophotographic apparatus according to claim 1, wherein the apparatus main body has a first main body and a second main body, and the exposure means is arranged on the first main body in a state of pressing the second main body. The electrophotographic apparatus according to claim 1. 5. The electrophotographic apparatus according to claim 4, wherein the first main body is connected to the second main body so as to be rotatable between a closed position and an open position.