JP2849978B2 - Imaging device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention
With a latent image carrier and an exposure device
In this state, the latent image carrier is charged, and the charged surface is
The latent image carrier is exposed to static electricity by
Form a latent image and visualize the electrostatic latent image with a developing device
To an image forming apparatus. 2. Description of the Related Art Copiers, printers and facsimile machines
An image forming apparatus of the above type configured as
It is. In such an image forming apparatus, the latent image
When the optical device is assembled, the relative position between them becomes inaccurate
Then, the quality of the image formed on the latent image carrier deteriorates. This
Position the latent image carrier and the exposure device with high accuracy.
Need to be Therefore, conventionally, the relative position of both is determined.
Exposure to the latent image carrier using high-precision positioning
The position of the optical device was set correctly. However, this is
Such a positioning means is expensive, and this
The overall cost increases. Also constitutes positioning means
When the elements deteriorate over time, the latent image carrier and the exposure
When they are attached, the relative position between them will be out of order.
As a result, the image quality of the image formed on the latent image carrier decreases. [0003] The object of the present invention is to
To provide an image forming apparatus that eliminates the conventional drawbacks.
You. [0004] The present invention achieves the above object.
To achieve this, in the image forming apparatus of the type described at the beginning,
Assembling the latent image carrier and a unit case supporting the latent image carrier
To form a carrier unit, and the carrier unit is
Support by the positioning frame supported by the imaging device body
Along with the exposure apparatus, a positioning frame is supported.
Supported by the imaging device body other than the imaging device body,
With the latent image carrier and the exposure device assembled, the
A part of the knit case is pressed into the optical system case of the exposure apparatus.
In order to position the latent image carrier and the exposure device in contact with each other.
Point the positioning frame toward the optical system case of the exposure apparatus
An image forming apparatus characterized by providing an elastic member for applying pressure
suggest. An embodiment of the present invention will be described below with reference to the drawings.
You. FIG. 1 shows a laser printer as an example of an image forming apparatus.
Data. In this laser printer, the image forming device
The main body, that is, the printer main body 10 is
And the upper body 10a, as shown in FIG.
Around the hinge (not shown)
To open and close the upper body 10a with respect to the lower body 10b.
It is configured as follows. [0007] In FIG.
The fed recording paper 2 is touched by a pair of registration rollers 3.
Latent image bearing composed of drum-shaped photoreceptor 4
It is transported to the carrier. The photoconductor 4 is moved clockwise in FIG.
It is driven to rotate, and at this time, the surface is charged by the charger 5.
And the charged surface thereof is supported by the upper body 10a.
Is irradiated with the laser beam L from the exposure device 6
An electrostatic latent image is formed on the image. This latent image passes through the developing device 7
Sometimes a visible image is created by the toner, and this visible image is
4 to the recording paper 2 conveyed to
The transferred visible image on the recording paper is transferred to the fixing device 9.
Is established by. The recording paper exiting the fixing device 9 is indicated by an arrow B
Is formed by the upper wall surface of the printer body 10 as shown in FIG.
The paper is discharged to the paper discharge unit 11. The exposure device 6 is illustrated.
Optical system and an optical system case that supports this
You. On the other hand, the photosensitive member after the transfer of the visible image
Cleaning device having a cleaning blade 12
The remaining toner is removed by the
Be affected. The toner removed from the photoconductor 4 is
The toner is collected in the toner collection chamber 15 by the car 14 and collected here.
Is accepted. In the laser printer shown in FIG.
The latent image carrier composed of the photoreceptor 4 and the components related thereto are
The developing device 7 is configured as one carrier unit 16.
Are also configured as one developing unit 17, and this
These units 16 and 17 are placed on the positioning frame 18
Each is detachably supported. As shown in FIG. 2, the carrier unit 16 is
It has a box-shaped unit case 19, and this unit case
The support shaft 4a of the photoreceptor 4 is rotatably supported by 19.
You. The unit case 19 receives the light from the exposure device 6.
A hole 20 into which laser light is incident is formed, and a unit case is formed.
The toner collection chamber 15 described above is partitioned by the 19 itself.
Have been. Further, the charging case is
Jar 5, static elimination brush 13, impeller 14, and cleaner
Bearing blades 12 are respectively supported, and these
The unit 16 is constituted. The developing device 7 is as shown in FIG.
To the developing tank 21 containing the toner T and the photoconductor 4
Developing roller 22, the toner layer thickness on the developing roller
Blade 24 and toner on developing roller 22
Supply roller 23 for supplying the toner T in the tank 21
An agitator 62 for stirring, a support shaft for the developing roller 22;
2a rotatably supports the tank 21 as shown in FIG.
The supply roller 23 and the agitator 62 are also
21 rotatably supported. In addition, regulation blade 2
4 also has one end fixed to the tank 21. Moreover
A toner cartridge 25 is detachable from the image tank 21.
And the cartridge 25 and the developing device 7
Thus, the developing unit 17 is configured. The carrier unit comprises a latent image carrier and a support for the latent image carrier.
It can be composed only of the members that it holds,
Even if the carrier unit is configured by adding parts
Good. The same applies to the developing unit, at least
What is necessary is just to make it the developing unit which has a developing device. A positioning frame 1 shown as an example in FIG.
8 is a box having an open top and a bottom wall
The lower body of the printer body 10 which is formed and which will be described later.
10b. Also, the positioning frame 18
Are a pair of positions fixed to the bottom wall as shown in FIG.
It has a determining member 26, and these positioning members 26 include:
A notch 27 for supporting the support shaft 4a of the photoconductor 4, a developing roller
Notches 28 for supporting the respective support shafts 22a are formed.
And the two support shafts 4a, 22a are fitted into the notches 27, 28, respectively.
By combining, the photoconductor 4, ie, the carrier unit
16 and the developing device 7, that is, the developing unit 17
Positioning and supporting it on the positioning frame 18
Can be configured as an integrated unit
it can. The width of the pair of notches 28 for the developing unit is
The shape is slightly larger than the diameter of the support shaft 22a of the developing roller 22.
And the support shaft 22a is fitted into these notches 28.
Between the positioning frame 18 and the developing unit 17
The spring 29 arranged moves the developing unit 17 to the left in FIG.
And the support shaft 22a is moved to one side of the cutout 28.
It is pressed against the surface as shown in FIG. For this reason,
And the photoconductor 4 are spaced apart from each other with a predetermined minute gap.
When making the gap, make the gap extend in the axial direction of the photoconductor.
And the surface of the developing roller 22 can be elastically deformed.
And press it against the photoreceptor 4 while elastically deforming it.
When pressing, the pressing force is applied in the axial direction of the developing roller 22.
It can be uniform throughout. As described above, the photosensitive member 4 and the developing device 7
Is a positioning frame 1 disposed on the printer body 10.
8 is supported. The printer body 10 includes an upper body 10a and a lower body.
The main body 10b is divided into two parts.
As described above, the exposure device 6 is supported by the upper main body 10a.
On the other hand, the positioning frame 18 is supported by the lower body 10b.
Then, the photoconductor 4 and the developing device are mounted on the positioning frame 18.
7 is supported. Therefore, as shown in FIG.
When the body 10a is opened, the photoconductor supported by the lower body 10b
4 and the exposure device 6 supported by the upper body 10a
Large separation. Lower the upper body 10a as shown in FIG.
When the photosensitive member 4 and the exposure device 6
Are assembled in a predetermined positional relationship with each other.
Performs the above-described image forming operation. As described above, the illustrated image forming apparatuses mutually
Latent image carrier comprising photoreceptor 4 removably mounted
And an exposure device 6, and a latent image
The carrier is charged, and the charged surface is exposed by an exposure device.
Forming an electrostatic latent image on the latent image carrier,
The image is configured to be visualized by the developing device 7.
I have. The upper body 10a is opened as shown in FIG.
And the positioning frame 18 is left on the lower body 10b,
Both units 16 and 17 have their upper parts exposed, and in this state
If the units 16 and 17 are lifted upward, each support shaft 4
a, 22a are outside the notches 27, 28 of the positioning member 26
To simplify both units, that is, the photoconductor 4 and the developing device 7
Can be removed from the printer body 10. unit
When mounting 16, 17 on the contrary, lower them from the top
And the support shafts 4a, 22a are fitted into the notches 27, 28.
You just need to At this time, the lower body 1 of the printer body 10
0b and the positioning frame 18 are kept horizontal.
Therefore, the worker can easily attach and detach the units 16 and 17.
Can be done in a posture. As described above, the laser printer of this embodiment has
The purpose of exchanging the developing device 7 and the photoconductor 4
When removing these, the developing device 7 and the photoreceptor 4 are removed.
It only needs to be lifted upwards to form an image of the developing device and photoconductor.
There is no need to pull it out toward the device body. others
When the developing device 7 and the photoconductor 4 are attached and detached,
Even if there is jam paper in the passage,
The photoreceptor 4 hits the paper strongly,
The developing device 7 interferes with the jammed paper, making it difficult to remove the jammed paper.
No such problems occur. Further, the developing device 7 is
It can be attached and detached while keeping it in a state, and tilt it diagonally
Since it is not necessary, the detachability is improved and
Can be prevented from scattering. Moreover, even if you attach or detach
If the splatters fall and fall down,
Because there is a bottom wall of the positioning frame 18, the toner
Is trapped by the bottom wall of the
I will not do it. For this reason, the recording paper is stained with toner.
Can be prevented. Also development equipment
Since the mounting unit 7 and the photoconductor 4 are detached in the vertical direction, the printer
There is no need to secure a large space in front of the body 10,
Reduce the actual installation space of the laser printer
Can be. The units 16, 17 are supported on the upper body 10a.
In this case, the upper body 10a
When opened, this will tilt with respect to the horizontal
Must be attached and detached while the units 16 and 17 are tilted,
Although there is a disadvantage that the workability is reduced, the laser printer of this example
Such a problem does not occur in the case of the above. As shown in FIG.
If the hand 60 is provided, grasp it and carry out its attaching / detaching work.
It is convenient. Similarly, the developing unit 17
A handle can be provided. The carrier unit 16 is positioned on the positioning frame 1
8, the photoconductor 4 is partially positioned on the positioning frame.
18, which protrudes into an opening 30 formed in the bottom wall, and
The gear 31 attached to 4a is inserted into the hole 32 in the bottom wall of the frame.
The not-shown teeth supported by the printer
Mesh with the car. The gear 31 is attached to the positioning frame 18.
Also meshes with the rotatably supported intermediate gear 33, the same
Other intermediate gear 34 supported by the positioning frame 18
Meshes with a gear (not shown) on the developing unit side,
The rotation of the gear on the side of the linter body is the rotation of the photosensitive member 4
2, transmitted to the supply roller 23, the agitator 62 and the like.
Thus, the gears on the units 16 and 17 side are unit
Of the printer body 10 and the frame 18
Engage or disengage with the gear, but in this example, each unit
It is possible to lift and lower the
Can be easily engaged with each other
You. Slide the units 16 and 17 horizontally.
When attaching or detaching gears, it is difficult to engage the gears
And the inconvenience of taking time to work is inevitable. Positioning
The bottom wall of the frame 18 is located at a position facing the photoconductor 4.
Since the opening 30 is formed, during image forming operation,
Visible image on body 4 can be transferred to recording paper without hindrance
You. In this embodiment, the carrier unit 16 and the developing unit
The units 17 are separately mounted on the positioning frame 18
Supported, so both units must be
It is not necessary to remove it, for example,
When replacing the developing unit, leave the developing unit 17 attached.
However, only the carrier unit 16 can be replaced.
It is difficult to replace the developing device 7 that can be used sufficiently.
You don't have to do anything economic. Also use different color toner
Prepare a plurality of stored developing devices and set the desired toner
When you select and use the developing device of
Unit 17 only needs to be replaced, no need to replace
Useless work such as replacing the body unit 16
No need. Therefore, the current toner containing different color toners
It is enough to prepare only the image unit. The toner cartridge 2 of the developing unit 17
5 is provided with a projection 134 as shown in FIG.
These engage with the mounting engagement portion 35 of the tank 21 to
A ridge 25 is mounted on the tank 21. Tank 21
If you need to supply toner inside the
25, the projection 134 is removed from the mounting engagement portion 35, and a new
The projecting piece 134 of the nut cartridge is
5 is attached. New toner cartridge 25
Is attached with a seal 36 as shown by a chain line in FIG.
The toner is contained inside, and the seal 36 is
Pull this in the direction perpendicular to the
Remove the toner from the cartridge 25, and remove the toner
The toner is dropped into the ink tank 21 to supply toner. in this way
The toner can be supplied by
The device is horizontally supported by the positioning frame 18.
Thus, this operation can be easily performed. The recording paper passes below the positioning frame 18.
The laser printer shown in the figure focuses on this point
The positioning frame 18 is conveyed below it.
Of the recording paper to be transported. In this example, FIG.
And as shown in FIG. 4, on the lower surface of the positioning frame 18
A plurality of ribs 39 are provided to guide the upper surface of the recording paper.
And transport of the recording paper by the positioning frame 18.
It forms part of the guide. In this manner, the positioning frame 18
Omitting other independent guide members located below
This has the advantage of reducing the number of parts.
can get. Moreover, as will be described later, the positioning frame 1
8 When it is rotated and lifted,
The advantage that it is possible to process jam paper easily
Also, the position near the photosensitive member 4 of the positioning frame 18 is obtained.
A separation claw 40 is formed at the portion in contact with the
The recording paper wound around the body 4 can be separated. Sand
That is, the recording paper 2 is wound around a latent image carrier composed of the photoconductor 4.
The separation claw 40 for preventing the
It is formed partly. This allows independent separation claws
Can be omitted, reducing the number of parts and costs.
Can be achieved. However, separate to the positioning frame 18
The separation claw of the member may be fixed. The positioning frame 18 is shown in FIG.
An engagement groove 37 is formed at the left end of the main body.
The pin 38 fixed to the body 10b is engaged,
The arm 18 can rotate around the pin 38
Have been. Also, the engagement groove 37 is detached from the pin 38,
While supporting the light body 4 and the developing device 7, the positioning frame
18 can be removed from the lower body 10b, and FIG.
Removes the positioning frame 18 from the lower body 10b.
And, from the frame 18, the two units 16, 17
This shows the state when the camera is removed. If the upper body 10a is opened as shown in FIG.
Pin the positioning frame 18 together with both units 16 and 17
It is possible to rotate as shown by arrow C around 38
Or the positioning frame together with the developing device 7 and the photoconductor 4
Arm 18 can be removed from the lower body 10b.
Then, open the upper part of the paper passage widely, and
The recording paper can be easily removed. Thus, the position
The decision frame 18 includes a latent image carrier made of the photoconductor 4 and the current frame.
Rotates upward with respect to the lower body 10b together with the imaging device 7.
Supported as well as removable. In the reverse operation
Therefore, the positioning frame 18 is connected to the developing device 7 and the photoconductor 4.
At the same time, it can be set to the state shown in FIG. When the recording paper is jammed, the developing device and the
Slide the light body toward the front of the imaging
When processing paper, the jam
Paper so that it can be rubbed against the photoconductor.
This may damage the photoconductor. Also this jam
The paper interferes with the photoconductor and the developing device,
It gets tricky. In contrast, the configuration of the illustrated embodiment
Moves the positioning frame 18 upward,
Lift the frame 18 together with the developing device 7 and the photoconductor 4
Because jam paper is processed, you may feel
The light body 4 is not damaged, and the paper passing is easy.
The road can be opened. In addition, the developing device is in a horizontal state.
While maintaining the positioning frame 18 in the lower body 10b.
Can be easily attached to and detached from
And it is not necessary to tilt the developing device 7 obliquely.
Therefore, the problem of toner scattering from the developing device 7 can be suppressed.
Wear. A positioning frame is provided below the developing device 7.
Since there is a bottom wall of the
When it is attached to and detached from the main body 18b, or when it is rotated
Even if the toner scatters from the developing device 7,
It does not fall into the paper path. Also jam paper
During the processing, the developing device 7 and the photoconductor 4
There is no need to pull it out before
There is no need to reserve a large space on the side. Positioning frame for developing device 7 and photoconductor 4
18 together with the positioning frame 18
Remove and open the top of the paper path to clear jammed paper.
It is possible to insert the hand from the near side of the imaging device main body
The workability is much better than when processing jammed paper.
Can be up. The developing unit 17 and the carrier unit 1
6 are configured separately, but the positioning frame 18
Rotation of both units causes both units to rotate.
Work without having to lift each
Wear. A handle 61 is also provided on the positioning frame 18.
And the turning operation thereof can be performed easily, which is advantageous. For example, when the developing device 7 and the photosensitive member 4 are exchanged.
When removing them from the printer body 10,
From the lower body 10b together with the positioning frame 18.
To replace the developing device 7 and the photoconductor 4
You can also do this without the traditional problems,
The replacement work can be performed. The recording paper 2 conveyed from the paper feeding device 1 is
Through a latent image carrier comprising an optical element 4 and then to the latent image carrier
Fixing located on the opposite side of paper feeder 1 with respect to holding body
The sheet feeding device 1, the latent image carrier, and the
The mounting device 9 is arranged, but the positioning frame 18
Represents the position of the pin 38, that is, the side of the fixing device 9.
The lower body 10 is rotatable upward about the end of the lower body 10.
b. Generally, the recording paper is fed to the fixing device 9 or the transfer
Jams are likely to occur in the area of the charger 8. Such a part
When the recording paper jams at the right end, the trailing edge
Will be located on the side of the device 1. Remove such jam paper
As described above, the positioning frame 18 is
Is rotated about the fixing device 9,
Is greatly opened upward. Therefore, it caused a jam
The trailing edge of the recording paper must be located on the side with the wide open
And the operator easily grasps this rear end by hand and
Can be pulled out. Thus, the positioning frame
18 without removing it from the lower body 10b.
Jam paper can be processed just by rotating
You. Grasp the trailing edge of the jammed recording paper with the fixing device 9
It can be easily removed. The positioning frame 18 is located on the side of the sheet feeding device 1.
As a fulcrum,
The recording paper jams at the location of the loading device 9 and the transfer charger 8
When raised, even if the positioning frame is rotated,
The trailing edge of the paper is on the fulcrum side of the positioning frame,
Since it will be located on the side that will not be opened sharply,
It is difficult to grasp the end. So, the recording paper that caused the jam
Of the tip of the fixing device 9 by hand,
If it is pulled downstream in the recording paper transport direction, the
The deposited toner passes through the fixing device 9, and when this occurs,
The unfixed toner is applied to the cooled fixing roller.
The problem of wearing occurs. With the laser printer shown
Can avoid all such problems
is there. By the way, as described above,
An image forming apparatus includes a photoreceptor that is removably assembled to each other.
And an exposure device 6 comprising a latent image carrier comprising
The above-described image forming operation is performed with the
However, when the latent image carrier and the exposure device are assembled,
If the relative position is incorrect, the image formed on the latent image
Image quality is reduced. For this reason, conventionally, highly accurate positioning
Means to set the relative position between the latent image carrier and the exposure device.
However, according to such a configuration, the cost of the image forming apparatus is increased.
Rise. Moreover, the elements of the positioning means are inferior with time.
When the latent image carrier and the exposure device are assembled,
Person's relative position becomes inaccurate. Therefore, in the image forming apparatus of this embodiment,
FIG. 1 illustrates a latent image carrier composed of a body 4 and an exposure device 6.
When assembled, the latent image carrier and the exposure device are
Unit housing that supports the latent image carrier
In the direction approaching the optical system case of the exposure apparatus 6.
The unit case 19 is pressurized and a part of the unit case 19 is exposed.
Elastic member to be pressed against the optical system case is provided.
You. In the illustrated example, as shown in FIG.
A foot member 49 is provided at the lower part of the determining frame 18 so that
When the positioning frame 18 is supported by the lower body 10b
In both cases, the frame portion opposite to the foot member 49 is
10b by means of an elastic member comprising a spring 50
Support and raise the positioning frame 18 by the action of the spring 50
To the unit case of the carrier unit 16, for example.
The projection 51 (FIG. 2) provided on the upper body 10 is attached to the upper body 10a.
Pressed against the optical system case of the supported exposure apparatus 6
Is configured. That is, after supporting the exposure device 6
The main body 10a to the lower main body 10b supporting the photoconductor 4
On the other hand, as shown in FIG.
When the exposure device 6 is assembled, the spring 50
A unit for urging the arm 18 upward and supporting the photoconductor 4
The case 19 is pressurized in a direction approaching the exposure device 6,
A part of the unit case 19 is connected to the optical system
And the photoconductor 4 and the exposure device 6 are positioned with respect to each other.
Decide. In the example shown, the positioning frame
The elastic member that urges the upper part 18 upward is attached to the positioning frame 1.
8 and the lower body 10b. As described above, in the image forming apparatus of this embodiment,
Is a latent image carrier configured as the photoconductor 4 and supports the same.
Carrier unit 1 by assembling with a unit case 19
6 and the carrier unit 16 is attached to the image forming apparatus main body.
While being supported by the supported positioning frame 18,
The optical device 6 is connected to an imaging device on which the positioning frame 18 is supported.
Supported by the imaging device body other than the
When the latent image carrier and the exposure device 6 are assembled,
A part of the case 19 is pressed into the optical system case of the exposure apparatus 6.
Position to position the latent image carrier and the exposure device in contact with each other.
Point the positioning frame 18 toward the optical system case of the exposure apparatus 6
There is provided an elastic member for applying pressure. The unit case supporting the photosensitive member 4 as described above
The optical system case of the exposure apparatus 6
And press them close to each other.
When the arrangement is adopted, the photoconductor 4 and the exposure device 6
When assembled, the relative position of the photoconductor 4 and the exposure device 6 is automatically set.
Position can be determined correctly,
Generation can be prevented. Thus, expensive position
The photoconductor 4 and the exposure device can be easily used without using the determining means.
6 can be positioned, reducing the cost of the laser printer.
Can be reduced. Moreover, the photosensitive member 4 is supported by the elastic member.
Unit case 19 and the optical system case of exposure apparatus 6
The relative position of the photoconductor 4 and the exposure device 6
Is defined, so that the positioning means is configured as in the past.
Of the photoconductor and the exposure device
There is no room for inconveniences such as incorrect placement.
In addition, when the imaging device is activated, there is some vibration
Even if the unit case 19 supporting the photoreceptor 4 is exposed
The optical system case of the device 6 is always pressed against the elastic member.
So that the relative position of the two does not go wrong,
High quality images can be formed. The present invention relates to various image forming apparatuses other than a laser printer.
Belt-shaped latent image carrier
The present invention can be widely applied to a conventional image forming apparatus and the like. According to the present invention, a latent image carrier and an exposure apparatus are provided.
When the unit is mounted, the unit case that supports the latent image carrier
Base and the optical system case of the exposure apparatus are
And press them close to each other to position them.
So that both are positioned correctly.
And a high quality image can be formed. Only
Compared with the case of using expensive positioning means
In addition, the cost of the image forming apparatus can be reduced. In addition, positioning
Deterioration due to wear of the elements that make up the means
The relative position between the latent image carrier and the exposure device
Absent. Also, when the imaging device is activated, vibration
However, the relative position between the latent image carrier and the exposure
However, a high-quality image can always be formed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a laser printer. FIG. 2 is a perspective view showing a developing unit and a carrier unit detached from a positioning frame. FIG. 3 is a perspective view showing a state where an upper main body is opened. FIG. 4 is a sectional view taken along line IV-IV of FIG. 1; FIG. 5 is a perspective view showing a state in which an upper main body is opened and a positioning frame is further rotated upward. [Description of Signs] 6 Exposure device 7 Developing device 16 Carrier unit 18 Positioning frame 19 Unit case

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-104958 (JP, A) JP-A-59-13247 (JP, A) JP-A-58-122102 (JP, A) JP-A-60-104 48067 (JP, A) Fully open, 55-58345 (JP, U) Fully open, 55-58346 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) G03G 15/00

Claims (1)

(57) [Claims] A latent image carrier having a latent image carrier and an exposure device which are assembled to be detachable from each other, and in a state where both are assembled, the latent image carrier is charged, and the charged surface is exposed by the exposure device to form a latent image. In an image forming apparatus for forming an electrostatic latent image on a carrier and visualizing the electrostatic latent image with a developing device, the latent image carrier and a unit case supporting the latent image carrier are assembled.
To form a carrier unit, and the carrier unit is
Support by the positioning frame supported by the imaging device body
Along with the exposure apparatus, a positioning frame is supported.
Supported by the imaging device body other than the imaging device body,
With the latent image carrier and the exposure device assembled, the
A part of the knit case is pressed into the optical system case of the exposure apparatus.
In order to position the latent image carrier and the exposure device in contact with each other.
Point the positioning frame toward the optical system case of the exposure apparatus
Imaging apparatus characterized in that a chaos that the elastic member.