JPH0447220A - Optical encoder disc - Google Patents

Abstract

PURPOSE:To enable a pattern formation simply by forming a disc pattern on a film provided on a disc surface. CONSTITUTION:A rotary disc 4 has a film on which a disc pattern 4a is printed with a printing press on a disc surface 4b of a disc body 4A. As the body 4a is transparent, the pattern 4a is made up of a printing pattern with each slit 4aA made transparent. Thus, a pattern can be formed simply.

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to a disk for an optical encoder, in particular:
A novel improvement for improving accuracy and cost by forming a disc pattern on a film on the disc surface.

b. Prior Art There are various types of discs for optical encoders of this type that have been used in the past, but a representative one is, for example, the one disclosed in Japanese Patent Application Laid-Open No. 1-173625. The configuration can be mentioned.

That is, although this configuration is not shown here, the disk pattern formed on the rotating disk was formed by etching.

C1 Problems to be Solved by the Invention Since the conventional optical encoder disk was configured as described above, the following problems existed.

In other words, as rotation control patterns have become more complex and sophisticated in recent years, the number of types of disk patterns has increased significantly, and the conventional etching-based forming method requires complicated and labor-intensive forming processes. However, forming many types of disk patterns requires a great deal of effort and time, and it has been extremely difficult to adequately meet the demand for multiple patterns at low cost.

Furthermore, since the etching process is complicated, the yield is low and it is not suitable for mass production.

The present invention has been made to solve the above-mentioned problems, and in particular, an optical encoder for improving accuracy and cost by forming a disk pattern on a film provided on the disk surface. The purpose is to provide discs.

d. Means for Solving the Problems The optical encoder disk according to the present invention irradiates light from a light emitter onto a disk pattern formed on the disk surface, and receives transmitted light or reflected light on a light receiver. In the optical encoder disc, the disc pattern is formed on a film provided on the disc surface.

e. Function: In the optical encoder disk according to the present invention,
Since the disk pattern is formed on a film attached to the disk surface, pattern formation is extremely easy, and no matter how complex the pattern, it can be formed easily and in a short time. I can do it.

f. Embodiment Hereinafter, a preferred embodiment of the optical encoder disk according to the present invention will be described with reference to the drawings.

Figures 1 to 41 are for showing the optical encoder disk according to the present invention. Figure 1 is a plan view of the disk before a film is attached, and Figure 2 is a plan view of the disk after the film is attached. FIG. 3 is an enlarged sectional view of the disk, and FIG. 4 is a sectional view of the optical encoder.

What is indicated by the reference numeral 1 in the figure is a base, and a rotating shaft 3 is rotatably provided on this base 1 via a bearing 2. At the end of this rotating shaft 11, a disk consisting of a large number of bars is attached. A rotating disk 4 having a pattern 4a is integrally attached.

A fixed slit plate 5 having a fixed slit (not shown) is disposed on one side of the rotating disk 4, and a fixed slit plate 5 having a fixed slit (not shown) is provided below the rotating disk 4. An element 6 is provided.

On the other side of the rotating disk 4, a circuit board 8 having an electronic circuit section 7 facing the rotating disk 4 is fixedly disposed by a fixing means (not shown), and on the lower surface of the circuit board 8, the electronic circuit section 7 is fixedly disposed. A light emitting element 9 is provided at a position corresponding to the slit plate 5 and the light receiving element 6.

The base 1 is fitted with a case body 12 in which a connection line 10 is attached via a bush 11, and the connection line 10 has a built-in power supply line 13 and a signal output line 14. ing.

? The i77 disc 4 is constructed as shown in FIGS. 1 and 2, and a film 20 on which the disc pattern 4a is printed on the disc surface 4b of the disc main body 4A by a printing means consisting of a printer (not shown) is provided. It is attached and installed.

Incidentally, this film 20 can also be a photographic negative.

Since the disk body 4A is transparent, this disk pattern 4a is formed by a printed pattern in which each slit 4aA portion is transparent.

Furthermore, when the disk pattern 4a is of a reflective type,
By oval-forming the film 20 in a non-transparent, relatively bright color and printing a black thread disc pattern 4a on the disc surface 4b, a reflective readable disc pattern 4a can be obtained.

If a multifunctional printing machine built into the various pattern 3 memory is used as the printing means, various disk patterns can be arbitrarily and quickly formed.

g9 Effects of the Invention Since the optical encoder disk according to the invention is configured as described above, the following effects can be obtained.

That is, since the disk pattern is formed on the film printed by the printing means, the pattern can be formed extremely easily, and no matter how complex the pattern, the pattern can be formed simply and in a short time. I can do it. In addition, by preparing a variety of films,
Any disc pattern can be formed on the disc.

[Brief explanation of the drawing]

1 to 4 are for showing the optical encoder disk according to the present invention. FIG. 1 is a plan view of the disk before the film is attached, and FIG. 2 is a plan view of the disk after the film is attached. FIG. 3 is an enlarged sectional view of the disk, and FIG. 4 is a sectional view of the optical encoder. 4a is a disk pattern, 4b is a disk surface, 6 is a photoreceptor, 9 is a light emitter, and 20 is a film. Patent Applicant: Tamagawa Seiki Co., Ltd. Agent: Teru Sowa Do Teru Figure 2

Claims (1)

[Claims] Light from a light emitter (9) is irradiated onto a disk pattern (4a) formed on a disk surface (4b), and the transmitted light or reflected light is received by a light receiver (6). In the optical encoder disc, the disc pattern (4a) is arranged on the disc surface (4a).
A disc for an optical encoder, characterized in that it is formed on a film (20) provided in b).