JPS6184622A - Rod lens array - Google Patents

Abstract

PURPOSE:To eliminate the need for the secondary work of a rod lens array for a cut part, hole, groove, etc., by providing a reference position member to the rod lens array. CONSTITUTION:The positioning member 2 in a rectangular prism shape has cut parts 6 at both the parts of its bottom surface 4. Then, hole 10 is bored piercing the positioning member 2 from its top surface 8 to its bottom surface 4. This hole 10 is in the same shape with the outward appearance of the rod lens array 100 and the rod lens array 100 is inserted into the hole 10 and positioned on the basis of the positioning member 2. Then, the cut parts 6 of the positioning member 2 are fitted in cut parts 6 of a support member 114 to be fitted. Thus, the need for the secondary work of the rod lens array for a cut part, hole, grooves, etc., is eliminated.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rod lens array used in an image reading device such as a facsimile machine, a copying machine, an image sensor, etc.
In particular, the present invention relates to a rod array provided with a positioning member to exhibit high positional accuracy in the optical axis direction of the rod lens array.

[Conventional technology]

In recent years, facsimile machines, copying machines, image sensors, and similar image reading devices have become smaller and lighter.
As the demand for lower prices increases, as an optical system,
The conventionally used spherical lens is abolished, and a new rod lens array consisting of a plurality of openings and drain lenses made of light-focusing glass fiber or the like is often adopted.

However, compared to spherical lenses, rod lens arrays have the advantage of having a short focal length, can be miniaturized, are lightweight, and are easy to handle due to their shape. Since it forms an image, such a rod lens array can be mounted with high accuracy on an image reading device.

FIG. 5 shows a conventional rod lens array 100. As shown in FIG.
has the shape of a rectangular parallelepiped, and a plurality of cylindrical rod lenses 104 are provided between two side plates 102 102 , and a black resin 106 is loaded between the mouth, the drain lens 104 and the side plate 102 to form the rod lens array 100 . is formed.

However, when attaching such a rod lens array 100 to an optical camera, it is necessary to do so at the same time as described above.

For this reason, as shown in FIG. 5(b), the rod lens array 10
A notch 108 is provided at the bottom of the rod lens array 100, or a hole 110 is formed in the rod lens array 100 as shown in FIG. 5(C). i
It was done to provide 1t2. FIG. 5(b) is a side view of the rod lens array 10'0, and FIG. 5(c) is a side view of the rod lens array 10'0.
.

2 is a plan view of the mouth and drain array 100. FIG.

Figure 6 is Figure 5(b) attached to an optical image reading device.
The slot lens array 100 shown in FIG. FIG. 3 is a plan view of the rod lens array ioo attached to the rod lens array ioo.

As shown in the figure, a notch 116 is also provided in the support member 114 of the optical image reading device, and the notch 1 of the support member 114 is
16 and the notch 108 of the rod lens array 100 are brought into contact with each other, and the rod lens array 100 and the support member 114 are brought into contact with each other.
A spring 118 is provided between the rod lens array lOO and the rod lens array lOO is positioned by adjusting the spring 118.

Furthermore, when installing the rod lens array 100 having the shape shown in FIG. Position and fix the optical image reading device and rod lens array.

[Problem that the invention seeks to solve]

As mentioned above, when mounting the conventional rod lens array 100 on an optical image reading device, the rod lens array 100 is provided with a notch 108 because positioning accuracy is required.
It is necessary to perform secondary processing to provide holes 110 and grooves 112, and this secondary processing increases costs.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides a rod lens array formed by arranging a plurality of rod lenses: a positioning member for attaching the rod lens array to a member to be attached is provided at 11 on the rod lens array. Features.

〔Example〕

Embodiments of the present invention will be described in detail below based on the drawings.

Figure 1 relates to the first embodiment of the present invention, and the figure (,) indicates the digit 1.
4 A perspective view of the positioning member 2, (b) and (e) are perspective views of the rod lens array 100 and the positioning member 2, and 1
011 plane cross-sectional view.

As shown in the figure (,), the positioning member 2 having a rectangular parallelepiped shape has notches 6 at both ends of its bottom surface 4, and a hole 10 penetrating from the top surface 8 to the bottom surface 4 of the positioning member 2. It will be done. The hole 10 is the rod lens array 1
00, and after inserting the rod lens array 00 into the pattern hole 10 and aligning the rod lens array 100 and the positioning member 2, as shown in FIG. As shown in Figure (c), the notch 116 of the support member 114, which is a member to be attached to the optical image reading device, and the notch 6 of the positioning member 2 are fitted together.

Fig. 2 shows a rod lens array according to a second embodiment of the present invention.
FIG. 1B is a sectional view of the rod lens array 100 attached to the optical image reading device.

The feature of the second embodiment is that, unlike the first embodiment, a pair of sliding frames 12, which are sliding members, are provided in the cutout portion 6 of the member 2.

Further, as shown in FIG. 2(b), a sliding hole 14 is provided in the support member 114 of the optical image reading device, and the sliding frame of the positioning member 2 joined to the rod lens array 100 is inserted into the sliding hole 14. 12 is inserted.

The rod lens array 100 can be moved in the vertical direction without tilting from the horizontal state by the slide 1b rod 12.

3 and 4 are a perspective view and an enlarged view of a main part of a readable recording device in which an optical image reading device is mounted on a carriage of a recording device such as a word processor.

As shown in FIG. 4, the optical image reading device 20 includes a rod lens array 100 according to the present invention, an LED array 17 as a light source, and a photoelectric conversion element 19.
The original 24 is irradiated with light emitted from the original 24, and the reflected light is imaged onto the photoelectric conversion element 19 by the rod lens array 100, thereby reading the original 24. In the recording apparatus shown in the figure, an optical direct image acquisition device bi, 20 is also mounted on a carriage 18 on which a beam cassette 16 is mounted, and the carriage 18 moves on a carriage guide 22.

When the recording device is used as a glintter, the optical image ($!reader t!j, 20 is not driven, and the ribbon cassette 1
6 is driven, the carriage 18 is moved to perform recording on the original 24. Also, when using the recording device as a reader, 17
The cassette '16 is not driven, and the original 24 is run while the optical image 1 uL taking device 20 is driven.
! Performs 24 readings. Note that 26 is a platen roller.

〔Effect of the invention〕

As explained above, according to the present invention, by providing a positioning member for positioning reference of the rod lens array, the following effects are achieved.

(1) There is no need to process notches, holes, grooves, etc. on the rod lens array, that is, there is no need to process glass rod lens arrays such as glass polishing, and costs can be reduced.

(2) Conventional processing techniques can be used as is for processing the positioning member.

(3) If a sliding member is provided, the sliding member not only serves to position the rod lens array when it is moved for focusing, but also serves as a moving guide and an auxiliary fixing member.

[Brief explanation of drawings]

FIG. 1 relates to a first embodiment of the present invention, and FIG. 1(a) is a perspective view of a positioning member, and FIGS. 2 shows a rod lens array according to a second embodiment of the present invention, FIG. 2(a) is a perspective view of a positioning member, and FIG. 31 and 4 are cross-sectional views of the rod lens array 100, and FIGS. 31 and 4 are optical images 1'J according to the present invention. A reading device is installed on a recording device such as a word processor - A perspective view and an enlarged view of the main parts of a readable recording device mounted on a carino are shown. Figure 5 (,) is a perspective view of a conventional rod lens array; h) and (C) are a side view and a top view of the rod lens array; FIG. 6 shows the rod lens array shown in FIG. 5(b) mounted on an optical 1701 image reading device; 60 is a side view of the rod lens array installed in the optical image reading device 1; FIG. 6(b)
) is a plan view of a rod lens array mounted on an optical image reading surface. In the figure, 2... position 1+ii: deciding member, 12... sliding rod, 1
4... Sliding 0/υ hole, lOO... Rod lens array, 104... Rod lens, 114... Supporting member. Figure 1 Figure 2

Claims (2)

[Claims] (1) In a rod lens array formed by arranging a plurality of rod lenses; a rod lens array characterized in that the rod lens array is provided with a positioning member for attaching the rod lens array to a member to be attached. (2) The rod lens array according to claim 1, wherein the positioning member includes a slide member.