JPS58102958A - Image forming device - Google Patents

Abstract

PURPOSE:To facilitate cleaning, check, and exchange of an array, by turnably supporting one end of the array of small short-focus image-forming elements arranged between an object surface and an image-forming face about an axle, and positioning the other end with positioning members. CONSTITUTION:A plurality of smal short-focus image-forming elements are arranged and plurally laminated to form an array 4, and placed in an outside frame F. One end of the frame F is positioned with a hole 32 fitted to a positioning pin 31 fixed to a immobile body 30, and supported turnably. A square notch 33 having a standard face A is provided on the other end of the frame F, and brought into contact with a positioning pin 34 fixed to the body 30. A hook 36 turnable about an axle 35 is energized downward with a spring 38 and presses the frame F, and a plate spring 40 prevents its displacement in the lateral direction. When it is released from the hook F, it becomes turnable, thus the array 4 to be easily cleaned, checked, and exchanged, and adapted to an image copying apparatus.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an imaging device, and particularly to an imaging device using a short focus small imaging element play as an imaging lens member.

First, the short focus small imaging element array will be explained. As shown in FIG.
A real image I of object 0 is created by guiding the incident light beam while bending it in a curved manner.
form. If the length of the element S is set appropriately, an erect phantom image of 0 equal magnification can be formed. Zan-like short focus small imaging element array Showa 4
It is described in Publication No. 7-28057, Publication No. 47-28058, etc. The one shown in Figure 1 O1) is a parlens element B, which has a longer length in the optical axis direction than the opening.
The first par lens Go and the second par lens B't are arranged so that their optical axes are aligned, and the first par lens B° forms an inverted real image IIt of the object 00 as an intermediate image, and the second par lens W° forms the intermediate image II. Inverted real image 11 - Fishing as if forming. 1st. The second par lens B, has the same focal length as B, tI! By using the intermediate image 1'O and arranging them at the same distance to the left and right from the intermediate image 1'O position, it is possible to form an erect real image of the object at the same magnification. A short-focus small imaging element using a saliva-like par lens is described in Japanese Patent Application No. 57515/1983, filed by the applicant of the present invention.

Figure 2 is the same size as shown in Figure 1 ■ and ■.
The short-focus small imaging elements (8, B) to be formed are held in parallel with each other and are tightly bundled in two tiers to form an array 4, which is fixed with an outer frame F. be. Of course, the elements (S or B) may be bundled in one stage, four times, or six times or more.

As shown in FIG. 5, this flexible array 4 is capable of forming an erect life-size real image I of an object 0 up to a length vh slightly longer than the array 4 by the cooperation of each element.

As mentioned above, the short-focus small imaging element array 4 (hereinafter simply referred to as the small imaging element array or simply array for simplicity) has its imaging characteristics as a normal through lens.

Compared to in-mirror lenses, it is possible to make the imaging distance extremely small, which has the advantage of reducing the space occupied by the imaging optical system in the image forming device, making it possible to make the device more compact. .

On the other hand, since the small image forming element array and the electrophotographic copying device array are installed close to the document presentation stand and the image forming section such as the photoreceptor, the light input/output surface is easily soiled and scratched. This means that they will be placed under conditions that make them more susceptible to stress. Therefore, it is necessary to clean the light input/output surface or replace the small gR element array itself.

Therefore, the array can be easily attached to and removed from a predetermined position.

Furthermore, a device that can be reliably supported when placed in that position is desired.

Conventionally, when supporting the short-focus small imaging element play in a predetermined position, the outer frame of the array was fixed to an immovable member using Ft-screws or pasted with adhesive.
In the former case, it is not easy to attach and detach the array, and it is extremely difficult to do so in a narrow space, and it is also possible to apply excessive force to the array itself by tightening the screws, damaging it or impairing its imaging performance. There are disadvantages such as deterioration and leakage. In addition, according to the latter method, it is possible to avoid unreasonable deformation of the array itself, but once it is assembled into the device, it cannot be expanded even if it is removed again.Furthermore, Mf defects at the time of assembly are likely to occur, and there is a possibility that there will be dangerous deposits such as φ, etc. I have it.

Therefore, the main purpose of the present invention is to use short-focus small imaging elements to easily attach and detach the array in the next imaging device, and to ensure that the position is accurately reproduced when placed in a predetermined position. Therefore, as a means for achieving the above object, the present invention forms an image of the object plane by arranging a short focus small imaging element in the optical path between the object plane and the imaging plane. Forms an image on the image plane. The imaging device is characterized in that one end of the array is rotatably supported around a shaft, and the other end is received by a positioning member.

Part 4 will be explained in detail below based on the embodiment shown in the drawings.
The figure shows a schematic configuration of an example of an image forming apparatus using a short-focus small imaging probe array as an imaging optical system, in which 11 is a machine box, 15 is arranged on the top plate 12 of the machine box, and a benign return movement is provided. A model document mounting table (hereinafter simply referred to as the document table) includes a top plate 1 of the box together with a document pressure bonding plate 14 that can be freely opened and closed with respect to the document table.
2. After reaching the home position (t) shown by the solid line near the left side of the top plate, it is driven forward to the right along the top plate (a), and when it reaches the forward end position (indicated by the two-dot chain line), it is driven backward. Return to the initial home position. The document table 13 is made of a transparent plate such as glass, and the draft 0 is placed on the document table 13 with the image side to be copied facing downward.

The document is set by placing the document pressure bonding plate 14 over it.

15 is located approximately at the center of the top plate 12 of the machine box in the direction of movement of the loading table (
The document illumination scanning slit opening 0.16 formed in the direction perpendicular to the sub-scanning direction (main scanning direction) directs the output optical axis toward the slit opening 5 near the slit opening 5 on the lower surface side of the machine box top plate 2. A light source W consisting of a light source 161 and a reflective shade 162 arranged at the same time! A device 4 is the above-mentioned nine short-focus small diameter array as the #i projection optical system disposed directly below the slit opening 15.

Reference numeral 17 denotes a drum-shaped electrophotographic photosensitive member (hereinafter abbreviated as photosensitive drum) disposed below the array 40, which is rotated forward about a shaft 171. 18 to 21 are electrophotographic process execution devices (Carlson process in this example) disposed around the photosensitive drum 17; specifically, 18 is a charger; 19 is a charger;
2 is a developing device, 20ti is Teidenki for transfer, and 21 is a photosensitive drum surface cleaner.

Then, set the original at 0t and drive the friend original table 16 forward! 51
1 m, the downward facing document surface on the document table 13 passes through the illumination slit opening 115t and is illuminated by the illumination device 16 sequentially from the right side to the left side through the transparent document table 13,
The reflected light from the document surface of the illumination light is +V<then array 4
(From ζ, the image is projected (slit exposure) onto the surface of the rotating photosensitive drum that has already been uniformly charged by the charger 18, and an electrostatic image is formed on the drum surface corresponding to the original image. Original table 1 The forward movement distance of !I is automatically controlled in length or short depending on the size of the transfer paper used or the size of the original O.The formed latent image is then developed as a toner image in the developing device 19, and the The toner image is transferred to the transfer paper by the transfer charger 20. The transfer paper is drawn into the machine from the paper feed table 22 by the paper feed roller 2'5, and the toner image on the drum and the register are transferred by the register roller 24. It is fed between the drum 17 and the transfer band 1 unit 20 at a timing such that the transfer band 1 is transferred.

In the image transfer tube receiver, the sedimentation paper is then separated from the surface of the drum 17 by a separating device 25, guided to a fixing device 27 by a guide 26, where the image is fixed, and then copied to a tray 29 outside the machine by a paper ejection roller 28. It is discharged as. Next, the drum surface from which the transfer paper has been separated is removed by a cleaner 21 to remove residual toner and dust, and is then cleaned and used repeatedly for the 0th-order push cycle, a short-focus small imaging element array. According to the present invention, one longitudinal end thereof is omitted in the figure as shown in FIG. By fitting into the positioning hole T, the pin 31 can be freely raised and rotated around the pinot 31. The positioning hole 32 on the array 4 side to be fitted with the pin 61 has a semi-length OVa in the optical axis direction of the array 4 as shown in FIG. From the position to the object plane side (original table 13g@) o < th < hair 2 river Δ
It is provided at a distance ta within the range of z1.

The other end side of the array 4 is 0<Ab<8Z- from the position IA of length 2 in the optical axis direction to the imaging plane side (drum 17 side).
7. Distance such that 1Δz1. Reference plane At at point b
It has a notch of 33'ft.

The reference plane At is pressed against another positioning pin 64 provided on the stationary member 30 to be positioned and supported at a predetermined position.

Also, to ensure that the reference image of the array 4 is held in contact with the positioning pin 64, as shown in FIG. It is designed to be held down at all times by I6. This presser member 66 is swingably supported around a support shaft 650 fixed to the main body case (not shown), and includes a pin 66 □ provided on the presser member 56 and a bottle 67 fixed to the main body case. The pressing force is obtained by a spring 58 stretched over the cabinet.

Further, by constantly pressing the longitudinal side surface of the array 4 opposite to the immovable part #60 by the plate spring 34, the array 4 is pressed against the immovable member 50 side, and the array 4 is attached to the support shaft pin 31.
This prevents the 36 from shifting in the axial direction.

Instead of the nine positioning pins 610, as shown in the example in FIG. 7, the play 41 may be freely rotated and the immovable member 60 may be supported by constantly applying a pressing force by means of stepped screws 39 and springs 40.

As described above, one end of the array 4 is supported by fitting the IIt pin 31 (39) and the bottle hole 62, and the other end is positioned and supported by the reference image and the pin 3'5, thereby forming a short focus small imaging element. Array positioning is possible. In the case of cleaning the array 4, etc., the expansion pressing member 66f: rotates clockwise against the spring 68 at the center of the shaft 65t to release the locking suppression f: of the array 4If, and then the array 4f: pin 31
The upper and lower surfaces of the array 4 can be easily cleaned by lifting the array 4 upward and rotating it as shown by the two-dot chain line in FIG.
1 as the center and press it down, the lower side of the end of the array 4 hits the cam slope part 662 of the holding member 66, and the holding member 66 is moved by the downward force of the contacting array 4 to the axis 35t - the spring 5BVC The array 4t-
The reference image can be pushed down until it hits the receiving pin 33. When the reference surface hits the receiving pin 35, the tip edge of the presser member 56 comes off the upper side of the array end, and the lower surface of the presser claw of the presser member 36 is held on the upper surface of the array end. Pressing is performed and the original state is restored.

In other words, conventionally, when cleaning the array 4, the whole array 4 was removed from the main body and cleaned.
After cleaning, it was very time consuming to return the array 4tPc to its original state 11, but according to the invention, the array 4 can be rotated using the retaining parts 51 and 32 as fulcrums without completely removing the array 4 from the main body. Since it is possible to carry out cleaning, etc., it is easy to return to the main body afterward.

Also, if the fitting hole 32t for the bottle shaft 31 of the array 4 is made into a 0-shaped slot 321 as shown in FIG.
Rotate around the center and lift it up to easily remove it from the play 4t-copying machine body, and after cleaning, etc.
Easy installation can be returned to original condition again.

Next, the rotation center position of one end of the 7-ray 4 and the reference surface position of the other end will be briefly explained. In Fig. 3, the object OO is the same size as the original image, and the object distance L□ and the image plane w
p can be obtained by placing the small imaging element array 4 at a position where 7Altl is equal, that is, a position where tu*t is satisfied. Therefore, it was temporarily removed for adjustment and cleaning, etc., and the 9-piece SaC child array 4t! It must always be reinstalled in a position that satisfies the above conditions. t one-way array 4t-51,
Regarding Σ, the small imaging element Play 4 has a slightly different material composition depending on its production, but the Mi11% property is the same, so the shooting distance is 1111Tt. He becomes a benefactor to the flies. The vI4tit is approximately ±1 mm* with respect to the standard fLVc in the case of a nine-small imaging element as shown in Figure 1 Qe.
In other words, the element dimension 2 is not constant at 'p6, but has a variation of ±1 - the angle of view.・tl
is the ingredient. Therefore, it is possible to attach the small imaging element array to a position that optically satisfies to-4 regardless of the element size 2 through play replacement. It is desirable to be able to return to the initially set position according to the optical characteristics of the array. Find this value 1fIjl plus 1
In the base example, the following positioning method was used.In other words, in the base example, a transparent plate such as glass (# name t, Jli fold ◆The array 4 due to the placement of the Otori area mounting stand 16 consisting of n)
The apparent displacement of the object surface relative to
Considering VC, the formal distance between the vII body and the imaging plane @h is set as T-T+ΔT (FIG. 6) rc. Concerning the small imaging probe array 4, the distance is extended to the body distance to be considered, so the geometric distance between the document placement surface of the document table and the array entrance end surface is +ΔT.

Next, we set the reference image person and rotation center H/hole 620 position mt for play positioning, and the position rt is the object m.
(Original side 0) and the imaging surface (Photoconductor 17 group)
The trout is placed in a position that does not cause any interference with the pattern needle, and is placed in the i position where there is no problem on the raw @ 7J11 work.

As mentioned earlier, 9. Array size 2, not always constant ±
If there is a variation of 1 degree of variation, and if such a stand is set Δ2, the color and array dimensions will be 2±Δ2.

Also, the center of the dimensions of the element must be aligned with the half position of the photograph 1Iiii 總T, which is shown in FIG. Here, regardless of the variation in the array size 2 of the leopard, the center of the array 4 is at the shooting distance T (#!6 in order to be at the center of the leopard)
AI shown in evil, Ah$huk O<Am<-Z −
The reference image and the center t of the pin hole '52 should be determined so that 1ΔzJ, 0<tb<5'' becomes the river ΔzI. Conventionally, as a method for positioning the small imaging element array 4, the VC mounting position of the play itself is used. *- It is known in history that the end face of the g-scraping member is raised to the reference position of the supporting member to determine the position of the play. teeth.

By attaching another member to the play area, a load of 1λ will be generated for the difference in the degree of sliding of the part, so it is possible to install the array at the desired O position. There will be trouble. Short-focus small imaging elements are softer than ordinary through lenses, in-see lenses, etc., and have a shallow depth of focus, so when installing IIc in an image forming device, the position should be set as much as possible, while using @. That's what i do! As can be seen from the above description, according to the present invention, the short focal length small imaging element array t can be easily and reliably supported at a predetermined position between the object plane and the imaging plane. In addition, there is no need to apply salt-free deformation force, so there is a decrease in imaging performance. C: Don't dance.

[Brief explanation of the drawing]

Part 1 Q and ■ are respectively explanatory diagrams of the formation of a single short-focus small imaging element, and Figure 2 is a plan view of the same element array. Fig. 6 is an explanatory diagram of the imaging principle of the same element play, a schematic configuration of an example of an image forming apparatus using a four-striped kite array ta image optical system, and Fig. 5 is a 7'CiX element array assembled thereto. FIG. 6 is an explanatory diagram of the dimensional relationship of the nine-piece array, and FIGS. 7 and 8 are diagrams showing modifications of the rotating shaft portions of the miners. 4 is a short focus small imaging element array, 31 (39) is the rotation center axis of the same play, 0 is a reference plane on the other end side, and 63 is a receiving pin. Fig. 5 Fig. 4 (,4) Fig. 4 (B) δ′B″ Te

Claims (1)

[Claims] (11) In an imaging device that forms an image of the object plane on the imaging plane by arranging a short-focus small imaging element array in the optical path between the object plane and the imaging plane, An imaging device characterized in that an iron array is supported at one end so as to be rotatable around an axis, and the other end is provided with a support on the positioning member. (2) Short-focus small imaging element play A positioning hole and a notch are provided at both ends of the outer frame of the holder, and the object plane and the image forming mt are brought into a conjugate relationship with respect to the above array, and the cough positioning hole t1gI dynamic center color center t- Claims characterized by: (Imaging device according to item 11) (3) The rotational center shape of the short-focus small imaging element play is a U-shaped groove, and the play is removable after 9 rotations. An imaging device according to claim (1).