JPS58174908A - Lens mounting structure - Google Patents

Abstract

PURPOSE:To utilize the direction of the high resolving power of a lens for forming a belt-like picture image by providing a screw hole to a mounting seat having a pair of V-shaped receiving faces that receive the circumferential surface of a cylindrical elns, and fixing the cylindrical lens therein by means of a holding band. CONSTITUTION:A through-hole 48 is punched at the center of the front wall 26a of a light shielding box 26, and a mounting seat 23 for a projection lens is provided on a bottom wall 16. A pair of receiving faces 49 (49A, 49B) of a V-shape in parallel with the central axial line of the hole 48 are provided to the seat 23. A projection lens 24 to be placed on the seat 49 is made in a cylindrical shape and has high resolving power in an arrow direction X. The optical axis of an exposure optical system and the center of the lens 24 are aligned simply by placing the lens 24 on the faces 49. The best picture image obtainable with the lens 24 is obtained if the lens 24 is turned so as to direct the high resolving power direction X of the lens 24 to the direction in parallel with the slit of a slit plate in this state and if the lens is fixed to the seat 23 by means of a holding band 25.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mounting portion for a projection lens of, for example, an electrophotographic copying machine, and more particularly to a mounting structure suitable for imaging a band-shaped image passing through a slit.

As is well known, for example, in the optical system of an electrophotographic copying machine, a transverse lens plate is placed in a light-shielding box, and a projection lens mounting pin 79 is screwed to this lens plate.

Above all, there are individual differences in the produced projection lenses, and in particular, the breaking power of the image has various values in any direction within the screen. Therefore, if the projection lens is screwed to the lens plate using the mounting flange as described above, the part of the projection lens that has the best disintegration force will be exposed to the strip-shaped surface that passes through the slit. .

Therefore, according to the present invention, the belt-shaped surface passing through the slit +11!
A structure in which a lens that forms an image is attached to the device fixing part) t[
In this method, a screw hole is provided in a mounting seat formed with a pair of "V"-shaped receiving surfaces that receive the curves of a cylindrical lens that rotates around the optical axis, and the cylindrical lens is held in the screw hole using a holding band. We propose to utilize the high resolution (elephant force direction) of the lens for imaging the band-like 1Ilj?elephant by fixing it to .

Embodiments of the invention will now be described in detail with reference to the drawings.

Prior to explaining the lens mounting structure according to the present invention, all the resins shown in FIGS. 1 and 2 in which the present invention is embodied will be described.
To explain the details of the ordinary light optical ring and its mounting structure, the body frame A of the electrophotographic copying machine has a pair of opposing ends 1[IA, IB, and these ends flA, 1B#].
c A pair of side plates fA to be assembled.

2B and is configured in a box shape with the upper part open.

In the center of the V-mu A of the above-mentioned body, as shown in ft14, there is installed a sensory drum 8 which is rotatably driven in the direction of the arrow 1#, and the m- of this sensory drum 8 is A plurality of processes ms, ie charging electrodes 4. aligned with the direction KII of the drum. Magnetic brush development value, transfer paper guide plate 6
．． Transfer/separation electrode, #electrode 8. Cleaning gear 9
These process devices are attached to a frame body which can be pulled out from the body frame A as shown in the first diagram. In addition, in the second WJ, the code 11. lfl, 18
, 14゜1S is a paper feed cassette, paper feed roller, and conveyance roller.

These are the fixing device and paper ejection roller device.

The side plates ff1A and 1B have upper flanges 2a and 2b bent inward at right angles to the fuselage frame, respectively, and these upper flanges 2a and fibK are integrally formed into a deep dish shape using a heat insulating resin. The molded lI party school housing B is @Tll. Although not limited to this, the m-element optical system housing B is constructed by first neutralizing and injecting an insufficient amount of foamed resin into the mold cavity volume tK,
After this, high pressure gas is blown into the cavity to harden the surface resin of the mold cavity.

By using a molding method that removes high-pressure gas and foams the internal resin, it is lightweight, has excellent insulation properties, and has no hot water sinks.
A housing with dimensions IvII can be obtained.

The housing B has a substantially rectangular bottom wall 16;
A pair of m*] surrounding this bottom wall 16 on all sides? A, 17B
and Confucianism 1118A, 18B.

These ends 111? A, 17B and side wall 18A, 1
A large number of ventilation holes 19 are bored in the bottom wall 16.
Mounting screws zl to be inserted into the mounting holes zoK formed at the four corners of
By screwing in ZK, the 4-optical system housing B can be attached to the fuselage frame AK. Therefore, exposure optical system housing B/) for one aircraft with 11 frames AK
In the assembled state! s2 KII body housing Y as shown
Since the space CK ventilation hole 19 between and the fuselage frame A is connected, lateral internal wind or blow-through occurs inside the optical system housing B, and overheating of the Russian party system is prevented. and K.

A projection lens mounting seat ZS is integrally molded in the center of the bottom wall 16 of the optical system housing B/), and the projection lens 24 is mounted on this projection lens mounting @'1.8.
It is attached using a letter-shaped band 2s. Also, previous #i
! A binding box sI4 that stands up upward is integrally molded at one end of the IIc wall 16.

this! On the end surface of the party nationality z6 opposite to the projection lens z4, there is a 1lldiKJl-directed 2ler 27 of the sensory drum 8.
is fixed. In addition, the lower m of the box 26 is covered with a small #1 plate z9 having a slit 28 and which can be freely inserted and removed.

41118A on both sides of the 1II1 party school housing B
.

The upper surface of 18B is used as guide rail surfaces 84A and 84B on which both ends of the 1st Ffl16 stand 88 to which the illumination lamp go, tler 81 and slit plate 8 are attached are placed, and the inner side of these guide rails @84A and JI4B is Guide rails on both sides 1118A and 18B located below @8SK
is two plates 86. that are at right angles. Both ends of the first movable base 88 having JI7 are guided and supported. Of course,
*First movable base 88! 111 part, aS fixed pulleys 40, 4 at both ends of the floating pulley 89° 4s1B 8A, 1ss at the end of the movable base 88].

@@ Wire #4 (not shown) is passed between relay pulley 4z in the middle of ZB, and this wire connects l1E.
If the first movable base 88 is moved at a constant speed and the second movable base s8 is moved at a speed b of the first movable base 88, then K is obtained.

On the other hand, both walls 18A and 1 of the four-party academic housing B
Both jIIliI of 8B and one car in the middle part @ wall 18A
, 8 pairs of posts AJllA rose above 18B, 4
8B, 480 and 44A, 44B, 440 are molded in one line. These posts have horizontal seats ([4!i) between which are a pair of glass mounts [46A, 46A, 46B is fixed with 47 screws, and these glass mounting IE46A.

At 46B, the original platen glass D is attached to the exposed optical system housing B.
It is installed and fixed so as to cover the upper part of the

Figures 1 to 8 and 4al show details of the lens mounting structure according to the present invention, and the above-mentioned #! A large diameter through hole 48 is bored in the center of the front wall 26 & of the party box s6, and a through hole 411
The projection lens mounting seat ms is integrally molded on the C-faced bottom 111a. This projection lens mounting seat $31 & 1L
, has a pair of receiving surfaces 49A and 49B facing each other in a "v1" shape in a plane parallel to the central axis (extending and perpendicular to the same central axis) of the through hole 48; Receiving surface 49A.

The outer seats FMS OA and 50B of 49B have screw holes 51A and Is IB. These screw holes 5 mA, i IBK are fixed screws 62A inserted into the −gIAs holes of the semicircular arc-shaped retaining band z6.

52B is screwed in.

Further, the projection lens No. 1 used in the present invention is made into a cylindrical shape 5 as shown in the figure, and has a high resolution power in the direction shown by the arrow X of IIIL4tIM. When attaching this projection lens z4 to the projection lens mounting seat N1tKN&, a rectangular spacer 54 with a required thickness and a K of 1 is interposed between the vertical surface 16m of the 1m-old bottle ZSa and the end surface of the projection lens z4. That is, the spacer 54 has a hole IS formed in the center thereof corresponding to the through hole 48, and a large number of spacers with different thicknesses are prepared, and the receiving surface 49A.

49B End surface and vertical surface 5a of projection lens z4 seated on soil
The one that corresponds to the distance between the two is used. This space t54
In order to guide and hold the front wall 26a, a guide @6fik and @B are integrally molded on the surface of the front wall 26a with a gap corresponding to one of the spacers b4.

Since the lens mounting structure according to the book address 4# is a structure like 1 or more, the receiving surface 491.49B of the projection lens mounting seat z8
[Just put the projection lens Z4 on it.

- The axis of the Yuan Party Xue yarn and the center of the projection lens z4 are completely aligned. Then, in this state f1gKM, the projection lens z
The projection lens 84 is rotated so that the high-resolution viewing force direction X of No. 4 is directed horizontally, that is, parallel to the slits of the slit plate 8, and the projection lens z4 is fixed to the projection lens mounting seat 88 with the holding band 2b.

The best image quality that can be obtained with this projection lens z4 can be obtained.

In conclusion, according to the present invention, effects such as ease of placing the lens on the receiving surface can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of the body of an electrophotographic copying machine embodying the present invention, FIG. The figure is a front view of the lens attachment section. z3--projection lens mounting seat, m4--projection lens, *
s---Retaining band, 411A, 411B...receiving surface. ! S] A, 61B---Threaded hole.

Claims (1)

[Claims] l) In a structure in which a lens for forming an image of a band 1i1j (Jll) passing through a slit is attached to a fixing part of the device, it receives the aspect of a cylindrical lens rotatable around the optical axis #V"
A screw hole is provided in the mounting seat, which has a pair of letter-shaped receiving surfaces.
A lens mounting structure characterized in that the cylindrical lens is fixed to the screw hole using a holding band.