JPS59128674A - Laser bar code scanner - Google Patents

Abstract

PURPOSE:To take out beams selectively from two sides of a housing by adding a few parts by fixing a rotary mirror at a fixed angle of inclination from an incident beam and outputting the output beam of the mirror directly or by changing the beam direction through a reflector. CONSTITUTION:A laser beam generating device 2, a half mirror 5, a reflector 6, and a photodetecting circuit 4 are arranged in the housing 1 for a laser bar code scanner. The rotary mirror 3 outputting an incident beam a1 transmitted from the device 2 through the mirror 5 as an output beam a2 with fixed reading width is also arranged in the housing 1. The mirror 3 is fixed in the housing 1 with an angle alpha of inclination from the incident beam a1 and rotated by a motor at a prescribed speed. The 1st and the 2nd drilled holes 10, 11 are formed on the sides of the housing 1 to project the projection beam a2 directly from a filter 8 to the outside or project the beam a2 from the drilled hole 11 by reflecting the beam a2 with a reflector 7 to change the direction. Thus, the projection beam a2 is projected selectively to the two sides of the housing 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a compact laser barcode scanner, and in particular to a laser barcode scanner that can extract a laser beam from two different faces of the housing depending on the mounting direction of the housing. The purpose is to provide.

As is well known, a laser barcode scanner irradiates a rotating mirror with a laser beam to form an output beam with a fixed reading width, and then scans the barcode by irradiating it and receiving the reflected light from the barcode. However,
In conventional compact laser barcode scanners, the output beam can only be emitted from one specific direction of the housing. For this reason, the mounting direction of the housing is limited and the amount of force required is limited, resulting in a lack of versatility.

This invention was developed in view of the above points, and by simply adding a few parts to the conventional one, it is highly versatile, allowing the user to selectively extract the laser beam from two different surfaces of the uzing. Laser barcode scanner is provided by Kalong.

In summary, this invention is capable of fixing a rotating mirror with a fixed angle of inclination relative to the incident beam, and outputting the output beam from the rotating mirror directly or by changing the beam direction through a reflecting mirror. So, two different housings
The individual surface is characterized by forming a window hole through which the output beam can be taken out.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

Figure 1 is a diagram for explaining the general operation of the laser barcode scanner of the present invention, Figure 2 is a diagram showing the configuration of the same essential parts, and Figure (a) shows an output beam that is directed to the outside of the housing without a reflector. (1) The figure shows the case where the output beam is taken out to the outside of the nozzle via a reflector.

Reference numeral 1 denotes a housing that houses the main body of the laser barcode scanner, and inside the housing 1 there is a laser beam generator 2 that generates a Nihara laser beam, and an output beam having a width of - Ube tori from the incident beam a from the laser beam generator 2. a2, a light receiving detection circuit 4 for receiving and reading 117 the reflected beam a3 of the output beam irradiated on the barcode A, and a light receiving detecting circuit 4r for guiding the reflected beam a3. It has a built-in half mirror 5, a reflection mirror 6, etc. The present invention has the above configuration 1/r i, in which a first window hole 10 for directly taking out the output beam a2 from the rotating mirror 3 to the outside of the housing 1 is formed on one side of the housing, and the rotating mirror 3 The beam direction of the output beam a2 is changed through the reflector plate 7, and the output beam a2 is extracted from the side of the housing 90 degrees apart from the first window hole 10 of the housing. A feature is that a window hole 11 of X2 is formed. + That is, the output beam a2 from the rotating mirror 3
According to the present invention, when directly extracting the beam to the outside of the nozzle 1, the rotating mirror 3 is fixed at an inclination angle α with respect to the incident beam alK, as shown in FIG. 2(a).
In the embodiment, the setting is 30 darkness in α. As is well known, the rotating mirror 3 is rotated by a motor (not shown) at a speed of several tens of revolutions per second and attached to the four sides of a cube, and when the incident beam a1 is irradiated onto the mirror. , the reflected light from the rotation [J: forms an output beam a2 with a constant reading width. This output beam a2 is directly transmitted to the first window hole 10.
The embodiment shown in FIG. 2(A) is designed to be taken out to the outside of the housing 1 through the hole.

In this case, the filter 8 is attached to the vJl window hole 10, and the reflector plate 7 is attached to the window hole 11 of the second option. Next, the first window hole 101/r filter 8
When the filter 8 is attached to the second window hole 11 while the reflector 7 is attached instead of the mirror 7, the output beam a2 from the rotating mirror 3 is attached to the first window hole 10 as shown in FIG. It is reflected by the reflecting plate 7 and taken out from the housing through the window hole 11 of !!2 through the filter 8. That is, the window holes are formed on two different faces of the housing 1, The reflection plate 7 is attached to one window hole f, and the filter 8 is attached to the other window hole, and these attachment locations are exchanged to direct the output beam a2 from a desired window hole among the two window holes. Note that the fixed tilt angle of the rotating mirror 3 in this invention is not necessarily limited to that of the embodiment.
However, it is necessary to set the value appropriately based on the relationship Vr with the position of the window hole formed in the housing, the reflection angle of the reflection plate 7, etc.
P1 is obtained.

Since the present invention is constructed as described above, it is possible to create a highly versatile laser barcode scanner that allows the user to selectively extract laser beams from two different faces of the housing, and to make it larger than conventional products. It's very easy to make a VC.

[Brief Description of the Drawings] Figure 1 is a diagram for explaining the general operation of the laser barcode scanner of the present invention, Figure 2 is a diagram showing the configuration of the same essential parts, and Figure C) shows output without a reflector. This shows the case where the beam is taken out to the outside of the housing, and Figure (b) shows the case where the output beam is taken out to the outside of the housing via a reflector. 1... Middle housing, 2... Laser beam generator, 3... Rotating mirror, 4... Light reception detection circuit, -〇- 5... Half mirror 16... ...Reflection Era-1
7...Reflector, 8...Filter, 10.
Window hole of No. 1, 11...Second window hole. '% b\ method

Claims (1)

[Claims] 1) A rotating mirror is irradiated with a laser beam to form an output beam with a constant reading width, and the bar code is irradiated with this output beam and the reflected light from the bar code is received and read. In a barcode scanner, a rotating mirror is fixed at a fixed angle of inclination to the incident beam, and the output beam from the rotating mirror is directed directly to the exterior of the housing by changing the beam direction via a reflector. 1. A laser barcode scanner characterized in that a window hole capable of outputting the output beam is formed on two different surfaces of the housing so that the output beam can be outputted. 2) Attach a reflector to one window hole of the housing, and store a filter in the other window hole, and exchange the suction positions of the stand and the like to direct the output beam to the two
2. The laser barcode scanner according to claim 1, wherein the laser barcode scanner can be taken out from a desired window hole behind each window hole.