JP3229553B2 - Optical path changing device for bar code reader - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bar code reader which emits a reading light toward a bar code label on which a bar code is recorded, and optically reads information recorded on the bar code label. The present invention relates to an optical path changing device for a bar code reader which is used by being attached to a code reader as an attachment.

[0002]

2. Description of the Related Art Various bar code readers have been developed and used for reading bar code symbols described on bar code labels. For example, as a typical example of such a bar code reader, a light projecting unit such as a semiconductor laser (LD) that emits predetermined reading light toward a bar code described on a bar code label, and a light emitting unit emitted from the light projecting unit. There is known a configuration in which the reflected light reflected and returned by the barcode label is incident on a light receiving means such as a silicon photodiode and converted into a predetermined electric signal to read information.

[0003]

By the way, in such a bar code reader, there is not much problem with a hand-held hand-held type, but in the case of a stationary type, the emission direction of the reading light is constant. Since it is not possible to freely change it according to the convenience of the place where it is used, there is a limitation on the mounting position and the like, and in some cases, it cannot be installed.

Accordingly, the present invention has been made in view of the above circumstances, and provides an optical path changing device of a bar code reader which can change and adjust the light emitting direction and the light receiving direction of the reading light according to the circumstances such as the place of use. It is intended for.

[0005]

According to the first aspect of the present invention, a reading light is emitted toward a bar code label on which a bar code is recorded, and the reflected light is reflected by the bar code label and returned. The optical path changing device of a bar code reader used by attaching to a bar code reader that optically reads information recorded on the bar code label by incident light , wherein the attachment is attached to a housing of the bar code reader.
The casing of the optical path changing device, which is integrally assembled and fixed, has a take-in window opened on one side of the casing, and the casing emits light from the open read window of the barcode reader inside the casing. A bending means such as a mirror or a prism which bends and reflects the reading light taken in from a predetermined direction is provided on one of the surface sides of the casing. A transmission window is provided which emits light toward the code label and into which reading light reflected by the bar code label enters.

According to a second aspect of the present invention, a tool such as a screwdriver is inserted into an operation hole opened in a part of the casing of the mounting member for mounting the bending means, and the reflection member is mounted by operating from the outside. Is provided with adjusting means for adjusting.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings. Figure 1 shows an optical path changing device of the bar code reader according to the present invention, this
Optical path changing device, A in the housing 1 of the bar code reader
A mounting plate portion 21 is provided in a part of the casing 2 for assembling and fixing integrally as a touchment.

A part of the casing 2, that is, the surface on which the mounting plate portion 21 is protruded, receives the reading light α emitted from the reading window 1A provided in the housing 1 of the bar code reader (of course, the bar code reader). The reading window 22 which also passes through the reading light reflected by the label) is opened over the entire surface. The height H and the width W on the opening surface side match the height H and the width W of the opening surface of the delivery window 1A of the casing 2, so that disturbance light does not enter. I have.

Further, the mounting plate 21 of the casing 2
On the opposite side (upper surface), a transmission window 2A from which the reading light reflected by the bending unit is emitted (of course, the reading light reflected by the bar code label also enters) is opened.

A mirror 4 serving as a bending means is mounted inside the casing 2 via a mounting member 3 bent in a substantially S-shape as shown in FIG. The bending means is not particularly limited to this mirror, and appropriate means such as a prism and a polarizing beam splitter can be applied.

The mounting member 3 is made of a suitable synthetic resin having a certain degree of elasticity (of course, it may be formed of a sheet metal or the like), and is fixed with screws. The female screw portion 3 to which the adjusting screw 31 serving as adjusting means is screwed to adjust and change the tilt angle of the mirror 4
A is provided.

An adjusting screw 31 is provided on the casing 2.
A through hole 2B is provided for rotating the mirror from outside of the casing 2 with a driver or the like. When the tip of the adjusting screw 31 presses a part of the mounting member 3, the mirror mounting portion 3B is delicate. It is changing.

In order to attach the casing 2 to the housing 1 of the bar code reader, as shown in FIG. 1, the casing 2 can be extremely easily fixed with a plurality of screws 23. Therefore, the housing 1 is also provided with a screw hole 1B at a corresponding position.

Therefore, according to this embodiment, in FIG. 3, the reading light emitted from the semiconductor laser (LD) 5 and reflected and vibrated by the polygon mirror 6 is originally projected almost horizontally. Although that is composed by attaching the optical path changing device, it is possible to deflect the optical path upward by a mirror 4.

[0015]

As described above, according to the present invention, there is provided a casing integrally fixed to the housing of a bar code reader, and an open intake window is provided on one side of the casing. A folding means such as a mirror or a prism is provided inside the casing to bend or reflect the reading light emitted from the opened reading window of the bar code reader and taken in from the taking window in a predetermined direction. On the side of the barcode, a transmission window for projecting the reading light after being bent / reflected by the bending means toward the barcode label and for receiving the reading light after being reflected by the barcode label is provided. Attachment to housing
The optical path can be easily changed simply by assembling them together, and even if it is difficult to use in some places, it can be applied. For example, the added value to the barcode reader increases, and the versatility improves. . Further, according to the present invention, there is also an effect that mounting can be extremely easily performed simply by assembling with screws.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a state when an optical path changing device is assembled to a bar code reader according to the present invention.

FIG. 2 is a schematic sectional view showing the device.

FIG. 3 is an explanatory view showing the operation of the device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 (Bar code reader) housing 2 Casing 3 Mounting member 4 Mirror

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenji Amagai 1-19-9 Tsutsumori, Sumida-ku, Tokyo Japan Electric Seiki Co., Ltd. (56) References JP-A-60-168282 (JP, A) (58 ) Surveyed field (Int.Cl. ⁷ , DB name) G06K 7/10

Claims (2)

(57) [Claims] 1. An optical system according to claim 1, wherein a reading light is emitted toward a bar code label on which a bar code is recorded, and reflected light reflected and reflected by the bar code label is incident thereon to optically record information recorded on the bar code label. An optical path changing device for a bar code reader attached to a bar code reader to be used for reading, wherein an attachment is provided on a housing of the bar code reader.
And a take-in window opened on one side of a casing of the optical path changing device, which is integrally assembled and fixed. The inside of the casing emits light from the open read window of the bar code reader and takes in the take-in. A bending means such as a mirror or a prism for bending / reflecting the reading light taken in from the window in a predetermined direction is provided, and the reading light after being bent / reflected by the bending means is provided on any surface side of the casing. An optical path changing device for a bar code reader, comprising a transmission window which emits light toward a bar code label and into which reading light reflected by the bar code label enters. 2. A mounting member for mounting the reflecting means, wherein an adjusting means for adjusting a mounting condition of the reflecting means by inserting a tool such as a screwdriver into an operation hole opened in a part of the casing and operating it from the outside is provided. The optical path changing device for a bar code reader according to claim 1.