JPH02120873A - Optical device and image forming device - Google Patents

Abstract

PURPOSE:To reduce costs and to enhance fitting accuracy by integrally forming plural supporting parts of optical elements. CONSTITUTION:Mirrors 46 and 47 being optical elements leading light from a light emitting means are attached to the supporting member 61, which is equipped with plural supporting parts 62 to 64. The supporting member 61 is press-molded from one plate, and is constituted by bending and erecting the supporting parts 63 and 64. With the mirrors 46 and 47, their both ends are inserted into fitting holes 65 and 66 of the erected supporting parts 63 and 64, fitted and attached. In such a way the supporting parts 62 to 64 are integrally formed to reduce the number of parts and costs. In addition, fitting accuracy can be enhanced.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to an image forming apparatus used as an optical device and an electronic copying machine, for example, provided in an electronic copying machine, and particularly relates to an optical device equipped with an optical device. The installation involves structural improvements.

(Prior art) In electronic copying machines and the like, an exposure lamp scans light onto a document placed on a document table, and the reflected light is guided to a photosensitive drum through an optical system consisting of mirror lenses. It forms an electrostatic latent image.

The mirror is supported by a support member 101 as shown in FIG. This support member 101 is a base 102
and a pair of side plates 103 (only the - side plate is shown). The side plate 103 has mounting holes 104,1
04, and one end of a mirror 105 is fitted into and supported by these mounting holes 104, 104.

Further, the side plate 103 is provided with an angle adjusting means 106 as shown in FIG. This angle adjustment means 10
6 includes a plate 107, which has a protrusion 108 at one end and an adjustment screw 109 at the other end.

When one end of the mirror 105 is inserted and fitted into the hole 104 for attaching the side plate 103, first, the angle adjustment means 106
The spring 110 is supported by the projection 108 of the plate 107.
Then, by screwing in the adjustment screw 109 by an appropriate amount, the angle of the mirror 105 is adjusted to ':J3.

(Problems to be Solved by the Invention) However, in the past, the support member 101 of the mirror 105 was composed of a plurality of members, that is, the base 102 and the side plates 103, 103, so the number of parts was large and the cost was high. As the size increases, mirror 10
There was also a problem that the positional accuracy of 5,105 was also lowered.

Further, the angle adjusting means 106 of the mirror 105 is
Since it has only one each of 8 and adjustment screw 109,
When the mirror 105 is inserted and fitted into the hole 104, the mirror 105 is inevitably tilted and adjustment using the adjustment screw 109 is required, which is a time-consuming problem.

The present invention has been made based on the above circumstances, and an object of the present invention is to provide an optical device and an image forming apparatus that can support an optical element at low cost and with high precision, and that can simplify the work of adjusting the angle of the optical element. The present invention aims to provide a forming device.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above problems, the present invention provides a light emitting means, an optical element that guides the light emitted from the light emitting means, and a support for the optical element. The plurality of support parts are integrally molded, and the angle of the optical element that is supported by the holding part and guides the light emitted from the light emitting means is adjusted by an angle adjustment means. The adjusting means has a pair of protrusions that press the optical element against the support part, and angle adjusting tools are respectively provided in the vicinity of these protrusions, a light emitting means, an optical element that guides the light emitted from the light emitting means, This optical device includes a plurality of support parts that support the optical element, and is characterized in that the plurality of support parts are integrally molded.

(Function) By the above means, the number of parts of the support member for the optical element can be reduced, and the optical element can be mounted without necessarily requiring angle adjustment.

(Example) The present invention will be described below with reference to an example shown in FIGS. 1 to 8.

Figure 2 shows the internal structure of the entire device, and Figure 3 shows the document holding cover with the cover open. An image forming process configuration means 2 is built in, and an original platen (hereinafter referred to as a platen glass) 3 on which an original plate is set is provided on the upper surface.

Further, on the rear edge of the apparatus main body 1, an original holding means 4 for holding down the original set on the platen glass 3 is attached, and on the front edge of the upper surface of the apparatus main body 1, a copy key 5, An operation panel 9 on which a clear/stop key 6, a numeric keypad 7, a display section 8, etc. are arranged is arranged.

Furthermore, a front cover 10 that can be opened and closed is provided on the front of the apparatus main body 1, and a paper feed cassette containing paper P such as plain paper to be supplied to the image forming process configuration means 2 is provided at the lower front of the apparatus body 1. is inserted.

Further, on the left side of the apparatus main body 1, a tray 12 for collecting finished sheets P and a power switch 13 are provided.

The image forming process configuration means 2 has the following configuration. That is, a drum-shaped photoreceptor 20 serving as an image carrier is arranged approximately at the center of the apparatus main body 1.
Around this photoconductor 20, along the rotation direction thereof, a charging device 21, an exposure section 22a1 of an exposure device 22, a developing device 2,
3. Pre-transfer exposure device 24, transfer device 25. Peeling device 26
．． Cleaning device 27. Static eliminators 28 and the like are sequentially arranged.

Furthermore, inside the main body 1 of the apparatus, paper P1 that is automatically fed from the paper feed cassette 11 or a manual paper feed tray 29 is provided.
The paper P manually fed through the image transfer section 30 between the photoreceptor 20 and the transfer device 25 is transferred to the main body 1 of the apparatus.
A paper transport path 31 leading to the tray 12 provided on the left side of the paper is formed.

A pair of registration rollers 32 is arranged on the upstream side of the image transfer section 30 of the paper conveyance path 31, and a fixing device 3 is arranged on the downstream side.
3 and a pair of paper ejection rollers 34 are arranged. Further, a conveyor belt unit 35 is disposed between the peeling device 26 and the fixing device 33.

In addition, paper P
A take-out roller 36 that takes out the paper P one by one, and a transport roller and separation roller that receive the paper P taken out through the take-out roller 36 and send it into a first branch transport path that forms the upstream side of the paper transport path 31. Separation and conveyance means 3 consisting of
7 are arranged. Further, a manual feeding feed roller 38 is disposed at the confluence of the first branched conveyance path and the second branched conveyance path for manual feeding.

Further, the exposure device 22 illuminates a document set on a platen glass 3 provided on the top surface of the main body 1 with an exposure lamp 41 whose back is surrounded by a reflector 40, and uses reflected light from the document document to The light is guided to a lens 45 as an optical element via a first mirror 42, a second mirror 43, and a third mirror 44 in order, and then the light transmitted through the lens 45 is guided to a fourth mirror 46 and a fifth mirror. 47, a sixth mirror 48, and a slit glass 49, and then the photoreceptor 20.
It is like this.

The exposure lamp 41 and the first mirror 42 surrounded by the reflector 40 are mounted on a first carriage 50 that is movable back and forth along the lower surface of the platen glass 3, and
The second mirror 43 and the third mirror 44
It is mounted on a second carriage 51 that moves in the same direction at half the speed of the carriage 5o, and these carriages 50
51 is the second one using the carriage sheet 52 etc. as a guide.
In the state shown in the figure, by moving from left to right in the figure, the original set on the platen glass 3 is scanned, and an image corresponding to the original is slit-exposed onto the photoreceptor 20. Note that the fourth mirror 46 and the fifth mirror 47 are assembled into a mirror support member 53 and are in a unitized state.

Further, the exposure apparatus 20 configured in this manner has a unit structure that is integrated into the frame 54, so that the exposure apparatus 20 can be handled as a single unit.

Further, the apparatus main body 1 is divided into two parts, an upper unit IA and a lower unit IB, with the paper transport path 31 as the border. The upper unit IA can be opened approximately 25 degrees using the upper unit IA as a pivot point. The support shaft 55
is composed of a shaft portion of a torsion bar that constantly biases the upper unit IA in the direction of opening.

Further, in FIG. 2, numeral 56 is a cooling fan disposed at the top of the fixing device, and numeral 57 is a manual feed guide that guides the paper that is manually fed. 58 is a high voltage transformer, 59 is a manuscript p
This is the scale that serves as the set standard.

It should be noted that the copying process for the original set on the platen glass 3 is well known and will not be described in detail.

Incidentally, the mirrors 46 and 47 are attached to a support member 61, as shown in FIG. This support member 61
has a plurality of support parts 62, 63, and 64. This support member 61 is press-molded from a single plate, and is constructed by bending and raising support portions 63 and 64. The mirrors 46 and 47 are attached by inserting and fitting both ends into the holes 65 and 66 to attach the upright support portions 63 and 64.

On the other hand, the support portion 63 is provided with angle adjustment means 67 as shown in FIG. This angle adjusting means 67 includes a plate 68, which has protrusions 69a and 69b on one side of the plate 68, and an adjusting screw 7 on the other side.
0a and 70b.

Further, the support portion 64 is provided with a mounting tool 73 having - number of protrusions 71 and adjustment screws 72, as shown in FIGS. 7 and 8.

When the mirrors 46 and 47 are inserted and fitted into the holes 65 and 66 for mounting the support portions 63 and 64 at both ends thereof,
First, one end of the holder is pressed against the spring 81 by the projections 68 and 69 of the plate 68 of the angle adjusting means 67, and when the angle needs to be adjusted, the adjusting screw 70a or 70b is screwed in by an appropriate amount. Adjust the angle of .47. Further, the other end sides of the mirrors 46 and 47 are fixed by being pressed against the receiving spring 82 by the protrusion 71 of the fitting 73.

As mentioned above, the support 62.63 of the mirror 46.47
．． 64 is integrally molded, the number of parts can be reduced and costs can be reduced, and the accuracy of mounting can also be improved.

Further, the angle adjusting means 67 includes two protrusions 69a and 69b disposed in the width direction of the mirror 46.47.
47, the mirrors 46 and 47 may be installed at a predetermined angle, and in this case, the adjustment screw 70a
, 70b becomes unnecessary.

[Effects of the Invention] As explained above, according to the present invention, since the plurality of support parts of the optical element are integrally molded, the number of parts can be reduced and costs can be reduced, and the optical element can be mounted with high accuracy. can also be improved.

In addition, since the angle adjustment means presses the optical element with a pair of protrusions, the optical element may be attached to the support part at a predetermined angle, and in this case, adjustment work using an adjustment tool is unnecessary and time-consuming. It has the effect of not having any.

[Brief explanation of drawings]

1 to 8 show an embodiment of the present invention, in which FIG. 1 is a perspective view showing a mirror support member, FIG. 2 is a schematic longitudinal sectional front view showing an electronic copying machine, and FIG. A schematic perspective view showing the appearance of the image forming apparatus with the document holding cover open;
FIG. 4 is a perspective view showing the angle adjustment means at one end of the mirror;
5 and 6 are explanatory diagrams showing the angle adjusting operation of the mirror, FIG. 7 is a side view showing the angle adjusting means on the other end side of the mirror, FIG. 8 is a perspective view thereof, and FIG. FIG. 10 is an exploded perspective view showing the support member, and a side view showing the conventional adjustment means. 20... Photosensitive drum (image carrier), 46.47...
Mirror (optical element) 61...Support member, 62°63
．． 64... Support part, 67... Angle adjustment means, 69a
, 69b--Protrusion, 70a, 70b--
Adjustment screw (3 degree angle adjuster). Figure 1 Applicant's agent Patent attorney Takehiko Suzue Figure C = -4 Figure 9.1 Figure

Claims (3)

[Claims] (1) A device comprising a light emitting means, an optical element that guides light emitted from the light emitting means, and a plurality of support parts that support the optical element, characterized in that the plurality of support parts are integrally molded. optical device. (2) An angle adjustment means that adjusts the angle of an optical element supported by a support part and guiding light emitted from a light emitting means, wherein the angle adjustment means has a pair of protrusions that press the optical element against the support part. In addition, an optical device characterized in that angle adjusters are provided in the vicinity of each of these protrusions. (3) In an optical device comprising a light emitting means, an optical element that guides light emitted from the light emitting means, and a plurality of support parts that support the optical element, the plurality of support parts are integrally molded. An image forming apparatus characterized by: