JPH0342674B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a convergent light transmission array device used in optical reading devices such as copying machines and facsimile machines.

<Summary of the Invention> Two converging light transmitting body arrays for variable magnification are arranged in parallel at predetermined positions, and the integrated converging light transmitting body array device is reversed vertically and horizontally to achieve desired variable magnification and focusing. By replacing the optical transmitter array with the optical path, it is possible to change the magnification of up to four different magnifications.

<Prior art> A variable magnification type electrophotographic device using a focusing light transmitting body array is known from Japanese Patent Application Laid-open No. 58-21764, etc.
According to this publication, it is stated that a convergent optical transmitter array for equal magnification and for reduction or enlargement is moved and arranged on a predetermined optical path by rotating or sliding in one direction.

However, with such a mechanism, even if two convergent light transmitting body arrays are used, the rotation is in one direction, so only two types of magnification can be selected from among equal magnification, small magnification, and enlarged magnification. For example, if one converging light transmitting body array is for equal magnification, the other converging light transmitting body array is for either reduction or enlargement, and the function as a variable magnification electrophotographic copying apparatus is degraded.

<Problems to be Solved by the Invention> As shown in FIG. 3, the variable magnification focusing optical transmitter array 32 has a reduction magnification and an enlargement magnification that are contradictory to each other. Although the structure is such that if the image is inverted at the center O between the image points (image points) 33 and 33, the magnification will be reversed, in the conventional mechanism described above, two converging optical transmitter arrays for variable magnification are replaced in the optical path. Although it is possible to rotate the convergent light transmitter array itself, it is not possible to invert the convergent light transmitter array itself, so only a fixed magnification of either reduction or enlargement can be selected. In other words, even though two convergent optical transmitter arrays with different magnification ratios are used, two
Only different magnification ratios can be achieved. In addition, the converging optical transmitter array for variable magnification has a fan-shaped shape connecting the input and output end surfaces of the lens, making cleaning and maintenance difficult when toner, dust, etc. adhere to the array.

The present invention was devised in view of the above-mentioned problems, and uses a convergent optical transmitter array having two different magnification ratios, and can easily perform four types of magnification conversion, and is also easy to clean and maintain. It is an object of the present invention to provide a replaceable convergent optical transmitter array device that can be used for

<Means for Solving the Problems> In order to achieve the above object, the optical device of the present invention has a guiding member fixedly provided on the optical device main body side for guiding and supporting the convergent light transmitting body array device. Inside the convergent light transmitter array device, two convergent light transmitter arrays are arranged in parallel.
Further, the convergent light transmitter arrays are arranged so that the optical axes of the two convergent light transmitter arrays are symmetrical with respect to the central axis of the convergent light transmitter array apparatus body which is parallel to the longitudinal direction of the arrays. A holding member is provided for fixation, and a guided member having an engaging portion that engages with the guide member is provided on the outer surface of the convergent light transmitter array device at a position that does not obstruct the optical axis of the array. Even if the convergent optical transmitter array device is inserted in the opposite direction or inserted half a rotation with respect to the central axis of the convergent optical transmitter array device main body, the above-mentioned It is characterized in that the positions of the engaging portions on the guided member are determined so that the central axes are at the same position.

<Embodiment> Hereinafter, an embodiment of the convergent optical transmission body array device according to the present invention will be described with reference to FIGS. 1 and 2.

FIGS. 1a, 1b, and 1c show the schematic structure of a replaceable convergent optical transmitter array device according to an embodiment of the present invention. In FIGS. 1a, b, and c, the replaceable convergent optical transmitter array device 1 has two convergent optical transmitter arrays 2, 2 having different magnification ratios and arranged parallel to each other and vertically shifted. ', a holding member 3 that holds the convergent light transmitting body array 2, 2', guided members 4, 4 arranged on both sides of the holding member 3, and glass members 5, 5 arranged above and below the holding member 3. And they are integrated.

The focusing optical transmitter arrays 2 and 2' are disclosed in Japanese Patent Application Laid-open No. 57
- As known from No. 16415, etc., it is a product in which cylindrical focusing light transmitters (product name: self-focus lenses) with variable magnification are arranged at a predetermined angle and pitch and integrated. On the other hand, it has a fan-shaped shape. Further, each of the convergent light transmitting body arrays 2, 2' has elongated circular grooves 6 for positioning at predetermined positions on both ends thereof. The holding member 3
is an array receiving surface 7 for receiving the convergent light transmitters 2, 2' so that the optical axes of the convergent light transmitter arrays 2, 2' are installed at symmetrical positions with respect to the y-axis passing through the center. , 7', a protrusion 8 for positioning the convergent optical transmitter array 2, 2' at a position to obtain a predetermined magnification ratio with respect to the x-axis, and glass members 5, 5 provided at both ends in the z-axis direction. It is provided with engaging guide grooves 10, 10, a positioning projection 11 with a tapered tip, and a knob 12. The guided member 4 has a concave cross section and has guided grooves (engaging portions) 9 and 9' arranged symmetrically with respect to the x-axis and the y-axis, and the holding member 3
be combined with and become one.

The replaceable convergent light transmitter array device 1 having the above-described configuration has two convergent light transmitter arrays 2, 2' having different magnification ratios. The round groove 6 and the protrusion 8 of the holding member 3 are engaged to obtain a predetermined magnification ratio, and the glass member 5 is inserted into the guide groove 10 of the holding member 3.
The guided members 4, 4 are pressed from both sides, and are fixed to the holding member 3 with the fixing screws 13, so that they become integrated.

Therefore, in this convergent light transmitter array device 1, the convergent light transmitter array 2, 2' is hermetically sealed with the holding member 3, the glass members 5, 5, and the guided members 4, 4, and the outer shape is It has a vertically and horizontally symmetrical shape with guided grooves 9, 9' with respect to the center of the holding member 3.
Further, in the longitudinal direction as well, it has a positioning protrusion 11 and a knob 12 at both ends, and has a symmetrical shape.

Next, with reference to FIGS. 2 and 4, a method of attaching the convergent optical transmitter array device 1 according to this embodiment to a copying machine base and four types of magnification changing methods by replacement will be explained.

FIG. 2 shows a state in which the convergent optical transmitter array device 1 is attached to a copying machine base (not shown). Rear side frame 14 of the copying machine body
A positioning rear frame 15 attached to the front side frame 16, a positioning front frame 17 attached to the front side frame 16, and a guide member 18 fixed to the rear side frame 14 and the front side frame 16 allow the convergent optical transmitter array device 1 to be stored. Space is defined. When arranging the convergent light transmitter array 2 on the optical path so as to obtain the magnification ratio m ₁ =x ₁ /y ₁ in FIG.
8 and the guide groove 9 of the convergent optical transmitter array device 1, and are slid and inserted. The positioning protrusion 11 at the tip of the convergent light transmitter array device 1 is guided into a taper and matches the opposing tapered positioning hole 19 of the rear positioning frame 15, and the convergent light transmitter array 2, 2' aligned in the optical axis direction.

The fixing frame 20 includes a protrusion 21 having a tapered tip to engage with the front positioning frame 17 at a predetermined position, and a tapered protrusion 21 that engages with the positioning protrusion 11 of the convergent light transmitter array device 1. It has a positioning hole 22, a shaft 23 and a leaf spring 24 that are integrally molded. The front positioning frame 17 includes a round hole 25 that engages with a protrusion 21 provided on the fixing frame 20 and a gate-shaped fastening hole that engages with a tightening claw 27 provided at the tip of the fixed handle 26. It has 28. Further, the fixed handle 26 is connected to the fixing frame 20.
The shaft 23 is inserted into the shaft 23, is locked with an E-ring 29 in a freely rotatable state, and is mounted on the fixing frame 20. A fixing handle 2 is used to fix the focused light transmitter array device 1 positioned as described above.
6, and engage the protrusion 21 of the fixed frame 20 into the round hole 25 of the front positioning frame 17 and push it in. While the fixed frame 20 is pushed in,
A positioning hole 22 provided in the fixed frame 20 is guided and fitted into the positioning protrusion 11 of the convergent light transmitting body array device 1 in a tapered manner. At this time, the leaf spring 24 provided on the insertion side of the fixed frame 20 is compressed and the fixed frame 20 receives a reaction force, but the front positioning frame 17 and the fixed frame 20 are pushed further until they come into close contact, and the fixed handle 26 is It is rotated in the direction of arrow A in FIG.

In this way, the convergent light transmission body array device 1
is fixed to a predetermined position on the copying machine base by the positioning protrusion 11 via the rear positioning frame 15, the fixed frame 20, and the front positioning frame 17. When removing the convergent optical transmitter array device 1 from the copying machine base in order to replace it in a horizontally rotated or vertically rotated state, the above-mentioned operation may be reversed. Even if this convergent light transmitter array device 1 is rotated horizontally or vertically, its outer shape is symmetrical in the vertical and horizontal axes, so that it can be easily attached to the base of a copying machine in the same way as described above.

Figures 4a, b, c, and d show the arrangement of the two convergent optical transmitter arrays 2 and 2' for variable magnification and the method of changing the magnification by replacing them at each magnification of the convergent optical transmitter array device 1. show.

FIG. 4a shows the original 31 at the first magnification m ₁ =x ₁ /y ₁ , the original table glass 35, the convergent light transmitter array device 1, the convergent light transmitter array for variable magnification 2, 2',
The relative positional relationship between the photoreceptor 34 and the guide member 18 is shown, and the center of the convergent light transmitting body array device 1 is the original 3.
1 and the photoreceptor 34.

FIG. 4b shows the selected state of the second magnification m ₂ =x ₂ /x ₁ =1/m ₁ , which is vertically inverted from the state shown in FIG. This is what I did.

FIG. 4c shows a selected state of the third magnification m ₃ =x ₃ /y ₁ , which is horizontally reversed from the state shown in FIG. 4a with respect to the center of the convergent light transmission array device 1.

FIG. 4 d shows the selection state of the fourth magnification m ₄ =x ₄ /y ₁ =1/m ₃ , which is located above and below the state shown in FIG. And it is left and right reversed.

<Effects of the Invention> The optical device of the present invention described above can obtain the following effects.

1) By replacing the convergent light transmitter array device, it is possible to change the magnification of up to four types with two convergent light transmitter arrays.

2) Since the number of constituent members of the convergent optical transmitter array device can be greatly reduced, it is possible to reduce the size and weight, and it is easy to secure the amount of light, which is a problem during mounting.

3) It is possible to integrate the convergent optical transmitter array device,
Since mechanisms such as rotation and shifting for lens switching are not required, the convergent light transmitting body array can be maintained at a predetermined position with high precision.

4) By engaging the guide member and the convergent light transmitter array device, it is possible to completely block light other than light passing through the convergent light transmitter array.

[Brief explanation of drawings]

Figures 1a, b, and c are schematic diagrams of an embodiment of a replaceable convergent optical transmitter array device according to the present invention, in which Figure 1a is a front view including a partial sectional view, and Figure 1b is a left side view. The top view, FIG. 1c is a BB sectional view.
Figures 2a, b, and c are schematic diagrams showing how to attach and fix the convergent optical transmitter array device of the present invention, and Figure 2a is a front view including a partial sectional view, and Figure 2b is a right side view. The top view and FIG. 2c are sectional views taken along line B-B.
FIG. 3 is an explanatory diagram showing the magnification conversion of the converging light transmitting body array for variable magnification, and FIG. FIG. 4A is an explanatory diagram showing the different magnification methods, FIG. 4A is an explanatory diagram showing the first magnification, FIG. 4B is the second magnification, FIG. 4C is the third magnification, and FIG. It is. DESCRIPTION OF SYMBOLS 1... Focusing light transmission body array device, 2, 2'... Focusing light transmission body array, 3... Holding member, 4... Guided member, 5... Glass member, 10... Guide groove.

Claims (1)

[Scope of Claims] 1. A replaceable convergent light transmitter array device having two convergent light transmitter arrays having different magnifications therein; an optical device main body having means for causing light from a document to enter one of the converging light transmitting body arrays in the converging light transmitting body array device and receiving the light focused by the convergent light transmitting body array; This is an optical device, in which a guiding member for guiding and supporting the convergent light transmitting body array device is fixedly installed on the optical device main body side, and there are two guide members inside the converging light transmitting body array device. to make the convergent light transmitter arrays parallel to each other, and the optical axes of the two convergent light transmitter arrays to the central axis of the convergent light transmitter array device parallel to the longitudinal direction of the arrays. A holding member is provided for fixing the convergent light transmitter array so that the convergent light transmitter array is symmetrical, and the guide member is provided on the outer surface of the convergent light transmitter array device in a position that does not obstruct the optical axis of the array. A guided member having an engaging portion that engages with the member is provided, so that it can be used when the direction of insertion of the convergent optical transmitter array device is reversed or when the guided member is inserted half way with respect to the central axis of the convergent optical transmitter array device main body. An optical device characterized in that the position of the engaging portion on the guided member is determined so that the central axis is located at the same position within the optical device main body even when the optical device is rotated and inserted.