JPS63109590A - Optical reader - Google Patents

Abstract

PURPOSE:To read data on any surface by providing a transmission window on the upper surface of an enclosure in which a photoelectric conversion part for detecting the brightness and the darkness of light is housed and placing a reflecting surface for reflecting the light from the light emitting part transmitted through the transmission window on the transmission window on the upper space of the transmission window. CONSTITUTION:Scanning lines 7-10 are radiated upward in multidirections from the light emitting part. For instance, the scanning line 9 radiated upward from the transmission window 2 is diffused and reflected on a mirror 5 and further diffused on a mirror 6 and reflected to the transmission window 2. As for other scanning lines, they are reflected on the mirror 5 or 6 according to a scanning angle and the directions of the light are various. Accordingly, at the time of reading the bar code of goods 11, even when the bar code is oriented to any direction, the light irradiates the bar code and the reflected light of the bar code can be reflected to the photoelectric conversion part by one or both the mirrors 5, 6. Thereby, the data of the goods 11 can be effectively read.

Description

[Detailed description of the invention] Industrial applications The present invention relates to an optical reading device.

2. Description of the Related Art Conventionally, as shown in FIG. There are optical reading devices that optically read data such as codes.

Problems to be Solved by the Invention However, the scanning puzzle of scanning in multiple directions from the light emitting part 24.2
5, 26, and 27, although the bottom and side surfaces of the product 23 are irradiated, the top surface of the product 23 is not irradiated. Therefore, if the barcode is facing upward, it is unreadable.

Means for Solving the Problem A light-transmitting window is provided on the top surface of a housing in which a light-emitting part and a photoelectric conversion part for detecting the brightness of light are built in, and the light rays from the light-emitting part that have passed through the light-transmitting window are A reflective surface that reflects light on the light-transmitting window is provided in a space above the light-transmitting window.

Effect: Therefore, the light rays from the light emitting part not only pass through the light-transmitting window and are irradiated upwards, but also the upward light rays are reflected on the reflective surface, resulting in light rays directed toward the light-transmitting window. It is also possible to irradiate the sides of the product with downward light. Therefore, when a product is passed between the translucent window and the reflective surface, it is possible to read data on any surface.

Embodiment An embodiment of the present invention will be explained based on FIG. Reference numeral 1 denotes a housing, and the housing 1 includes a light emitting section (not shown) and a photoelectric conversion section (not shown). The light emitting part is
For example, it includes a polygon mirror, a hologram disk, a galvano mirror, etc. that scans a laser beam, and a group of mirrors that converts the scanning line into a dynamic pattern, lattice pattern, etc., but the type is not limited.

A transparent window 2 is formed on the top surface of the housing 1, and
A side wall 3 that extends upward from the end of the transparent window 2 and a ceiling surface 4 that slopes slightly upward toward the tip are continuously formed, and these side walls 3 and the ceiling surface 4 have reflective surfaces. Mirrors 5 and 6 are fixed.

In configuration 2, scanning lines 7, 8, 9, and 10 are emitted upward from the light emitting section in multiple directions.

Now, if we take a specific scanning line 9 and look at its reflection state, the scanning line 9 irradiated upward from the transparent window 2 is reflected while being diffused by the mirror 5, and is further diffused and transmitted by the mirror 6. The light is reflected toward the light window 2. Looking at other scanning lines, the direction of the light rays varies depending on the scanning angle as they are reflected by the mirror 5 or 6. Therefore, product 1
When reading the barcode No. 1, no matter which direction the barcode is facing, the barcode is irradiated with a beam of light, and the reflected light of the barcode is reflected by one or both of the mirrors 5 and 6 and directed toward the photoelectric conversion section. This allows product 1 to be reflected.
1 data can be read reliably. In addition, transparent window 2
The number of mirrors that reflect the scanning lines scanned from the mirror toward the transparent window 2 is not limited to two as in this embodiment.
- or two or more sheets.

Effects of the Invention Since the present invention is constructed as described above, the light rays from the light emitting part not only pass through the transparent window and are irradiated upward;
Since this upward light ray is reflected by the reflective surface, a light ray directed toward the transparent window is obtained, and both the upward and downward light rays can be irradiated to the side of the product. It has the effect of being able to read the data on any side when passing the product between them.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the second invention, and FIG. 2 is a perspective view showing a conventional example. 1... Housing, 2... Translucent window, 5, 6... Mirror (
reflective surface)

Claims (1)

[Claims] A light-transmitting window is provided on the upper surface of a housing in which a light-emitting part and a photoelectric conversion part for detecting the brightness of the light are built, and a reflecting surface reflects the light rays from the light-emitting part that have passed through the light-transmitting window onto the light-transmitting window. An optical reading device characterized in that an optical reading device is provided in a space above the light-transmitting window.