JPS6016138Y2 - Light receiving element holding mechanism of facsimile machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an adjustment mechanism for a light-receiving section used for reading a document in a facsimile machine.

In particular, the present invention relates to a position adjustment mechanism for a light-receiving element capable of one-dimensional scanning, such as a charge couple device or a photodiode array, which require precision in minute positions.

Conventionally, for this type of mounting position adjustment, as shown in FIG. The substrate 2 was attached, the position on the surface of the substrate 2 was adjusted, and the substrate 2 was fixed to posts (four corners) on the optical bench 3.

However, this position adjustment method and fixing method have the disadvantage that it takes time to adjust the position and at the same time, positional deviation occurs when the substrate 2 is fixed, resulting in considerable variation in the accuracy of the adjusted position.

SUMMARY OF THE INVENTION In order to overcome these drawbacks, the present invention provides a light-receiving element holding mechanism for a facsimile machine that has a simple structure, is easy to adjust, and has little variation in adjustment accuracy.

According to the present invention, in the document reading light receiving section of a plane scanning facsimile device, a hollow cylindrical holding table having a through hole;
an imaging lens inserted into one end of the through hole of the holding base;
an annular light-receiving element holding member whose one end is disposed at the other end of the through hole of the holding base and facing the imaging lens; a light-receiving element disposed within the ring of the light-receiving element holding member; a moving member fixed to the light receiving element holding member for moving the light receiving element on a plane perpendicular to the central axis of the through hole, the light receiving element holding member being disposed coaxially with the optical axis of the lens; A light receiving element holding mechanism for a facsimile machine is obtained.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 shows a light-receiving element holding mechanism according to an embodiment of the present invention, which includes a lens 4, a holding base 11, a screw member 7 that is a member for moving the light-receiving element 1 having a through hole in the -axial direction, and the light-receiving element 1.
The light-receiving element holding member 6 includes a plate-shaped spring member 8 and a light-receiving element holding member 6.

The light-receiving element holding member 6 is rotatably inserted into the cylindrical recess 12 of the holding bracket 11, which has been machined to ensure precision, and aligns the optical axis of the lens 4 attached to the holding base 11 with the light-receiving element holding member. The structure is such that the centers of the members 6 coincide without adjustment.

Further, the light-receiving element holding member 6 is fixed with screws 13, with the perpendicularity of the surface of the light-receiving element holding member 6 relative to the base portion 14 also being determined by the precision of the fixing base 13.

The positioning of the light receiving element 1 with respect to the center of the light receiving element holding member 6 is adjusted in advance by a plurality of screw members 7 and a plate-shaped spring member 8, as shown in FIG. 2, and is fixed by the screw 6.

If the positioning of the light receiving element 1 with respect to the light receiving element holding member 6 is determined in advance using an adjustment jig or the like before attaching the light receiving element holding member 6 to the holding base 11 in this way, the position of the light receiving element 1 can be easily adjusted. I can do it.

When attaching the light-receiving element holding member 6 to the holder 11, adjustment can be made very easily simply by adjusting the rotational direction of the light-receiving element holding member 6.

As explained above, in this invention, most of the multiple adjustment elements can be adjusted externally using adjustment jigs.
Further, there is an advantage that adjustment at the time of installation can be simplified, the difficulty of conventional adjustment can be eliminated, and at the same time adjustment accuracy can be improved.

[Brief explanation of drawings]

Fig. 1 is a side sectional view of a conventional light receiving element holding mechanism, Fig. 2 is a view of the position adjustment and holding mechanism of the light receiving element with respect to the light receiving element holding member of the embodiment of the present invention, and Fig. 3 is a light receiving element of the embodiment of the present invention. It is a side sectional view of an element holding mechanism. 1... Light receiving element, 2... Substrate, 3...
...Optical bench, 4...Lens, 5...
・Post, 6... Light receiving element holding member, 7...
...Screw member, 8...Plate spring member, 11.
...Holding stand, 13...Fixing stand.

Claims (1)

[Scope of utility model registration request] In a document reading light receiving section of a flat scanning facsimile device, a hollow cylindrical holding stand having a through hole, an imaging lens inserted into one end of the through hole of the holding stand, and one end surface of the holding stand having a hole other than the through hole of the holding stand. an annular light-receiving element holding member disposed at an end facing the imaging lens; a light-receiving element disposed within the ring of the light-receiving element holding member; and a moving member fixed to the light receiving element holding member that is moved on a vertical plane, the light receiving element holding member being disposed coaxially with the optical axis of the lens. Element holding mechanism.