JP2001256426A - Barcode reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate device installation work accompanying cable connection about a barcode reader embedded in a counter to be used. SOLUTION: This barcode reader is provided with a printed circuit board on which a controlling part, a connector for feeding power supply to the device and a plurality of connectors such as connectors inputting or outputting a signal are arranged horizontally on the bottom face of the device. A notch for forming a space is provided at the bottom part of the back face of the device embedded lower than a counter surface, and each of the connectors is provided on the back face of the device which is deeper than the other back faces due to the notch and also in the vicinity of the bottom face so as to face the horizontal direction of the device.

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bar code reader used in a POS system or the like and installed on a counter of a store to read a bar code attached to a product.
2. Description of the Related Art In recent years, in a POS system, distribution management, and the like, it has been widely performed to read a barcode attached to an article using a barcode reader and perform a payment process or management of the product. In such a barcode reader, a barcode is read by emitting a light beam such as a laser beam toward the barcode, scanning the barcode surface, and detecting the laser beam reflected by the barcode. ing.

2. Description of the Related Art FIG. 62 is a view showing a conventional bar code reader, and particularly shows a perspective view so that the internal structure can be understood. In a bar code reader, a laser light source such as a semiconductor laser is used as a light source. In the figure, reference numeral 201 denotes a laser module, which includes a laser light source, a lens, and the like. A polygon mirror 202 is a polygon mirror having a plurality of reflection surfaces. The polygon mirror 202 is driven to rotate by a motor. The laser light emitted from the laser module 201 is reflected by a small plane mirror provided at the center of the concave mirror 203 and reaches the reflection surface of the polygon mirror 202. Although the laser light is reflected by the reflection surface of the polygon mirror 20, the laser light is scanned, for example, clockwise in the figure because the polygon mirror 202 is driven to rotate.
Reference numeral 204 denotes a scanning line dividing mirror, which is a polygon mirror 2
The laser beam scanned by 0 enters. The laser light is reflected downward by the scanning line dividing mirror 204,
After being reflected upward by a substantially V-shaped bottom mirror 205, the light is emitted from a reading window 206. Reading window 2
The laser beam emitted from 06 scans the article 207 passing over the barcode reader. The laser beam that scans the article 207 is reflected on a barcode surface or the like, and enters the barcode reader via the reading window 206. The reflected light from the barcode that has entered the barcode reader is reflected by the bottom mirror 205, the scanning line split mirror 204, and the polygon mirror 202, and enters the concave mirror 203. The concave mirror 203 condenses the laser light diffused and reflected from the barcode toward the photodetector 208. Light detector 2
The laser beam received by 08 is demodulated by a demodulation circuit provided in a bar code reader or the like, and output to an external device. Here, the reading window 206 of the bar code reader of FIG. When installing such a barcode reader on the checkout counter, a method of setting the reading window surface to be flush with the counter surface, and a method of setting the reading window on the counter so as to be substantially vertical. It can be broadly divided into As described above, the barcode reader provided in the checkout counter has only one reading window. Meanwhile, to read barcodes,
Although the article is passed over the barcode, if the barcode is not oriented in the direction of the reading window, the barcode cannot be scanned by the scanning light, and the barcode cannot be read. This is because, in the conventional bar code reader, the scanning range of the scanning light or the direction in which the scanning light is emitted is limited. In order to solve such problems, we have multiple reading windows,
A bar code reader has been devised which emits scanning light from each reading window so that an article with a bar code can be scanned from a plurality of different directions. FIG.
3. FIG. 64 shows an example of the appearance of a barcode reader in which such measures are taken. With these barcode readers,
A reading window 206a is provided on the bottom surface of the apparatus, and a reading window 206b on a side surface which is set up at an angle almost perpendicular to the lower surface reading window 206a. From the reading window 206a on the lower surface, the upper side reading window 2
The scanning light is emitted in the direction toward 06b. On the other hand, scanning light is emitted from the side reading window 206b in a substantially horizontal direction (toward the operator). As described above, since the scanning light is provided in a plurality of directions and the scanning light is emitted from the respective reading windows in a plurality of directions, the scanning light is applied to the article passing through the bar code reader from the plurality of directions. Is more likely to be scanned with a barcode than a single barcode reader. FIG. 65 illustrates a checkout counter (checkout counter) in which such a barcode reader is installed. On the checkout counter 211, a barcode reader 200 is provided. The operator stands at a position opposing the side reading window (side window 206b in the figure). On the upper side of the side window 206b, a keyboard 212 for inputting information on a product not having a barcode attached thereto.
Is attached. In addition, a conveyor 213 is located upstream of the checkout counter, and conveys goods to the position of the barcode reader 200. A POS terminal 214 is provided beside the operator, and the settlement process is performed by the POS terminal 214. FIG.
FIG. 66 shows a barcode reading range when the barcode reader of FIG. 64 is used. Here, the hatched area is where the scanning light emitted from the side window 206b and the bottom window 206a (bottom reading window) is gathered, and even if the bar code is rotated 360 ° in the horizontal direction, the bar code is displayed. This shows an area that can be read. As described above, since the scanning light is emitted from each of the two reading windows, the range in which the barcode can be read is widened, and even if the barcode surface does not completely face one of the reading windows, the barcode can be read. Can be read.

Here, the conventional bar code reader has the following problems. That is, as shown in FIGS. 63 to 65, the barcode reader is embedded and installed on the counter surface. In this case, as the installation method, after connecting the connector and cable,
It is common to embed a barcode reader in a counter. Therefore, there remain problems that it is necessary to make it easy to confirm the position of the connector when connecting, that it is necessary to prevent the cable from getting in the way at the time of embedding, and that it is necessary to prevent the cable tip from being crushed. An object of the present invention is to realize a barcode reader that solves the above problems.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises a reading window for emitting a scanning light at least at an upper part, and is used by being embedded in a counter surface on which an article to be read is placed. Bar code reader
A control unit, a connector for supplying power to the device, a printed circuit board on which a plurality of connectors such as a connector for inputting or outputting a signal are arranged in a horizontal direction are provided on the bottom surface of the device,
A notch for forming a space is provided in the bottom of the device rear surface embedded below the counter surface, and each of the connectors is provided near the bottom surface of the device and near the bottom surface which is recessed from the other back surface by the notch. It is characterized by being provided so as to face in the horizontal direction.

FIG. 1 shows a bar according to an embodiment of the present invention.
It is a perspective view of a code reader appearance. Below, using the drawings
A bar code reader according to an embodiment of the present invention will be described.
I will tell. The barcode reader according to the present embodiment includes
Is equipped with a light source such as a semiconductor laser.
The bar code is scanned by emitting the scanning light, and the
The bar code is read by receiving the reflected light.
The bar code reader 1 according to the present embodiment has a side scan.
The main part 2 and the bottom scanner part 3
Can be opened. The side scanner unit 2 is
A reading window called window 4 is provided. Side scan
The scanning light by the corner portion 2 is almost water from the side window 4.
The quotient that is emitted in the horizontal direction and passes over the barcode reader 1
Scan the article. On the other hand, the bottom window portion 3 is
A reading window called window 5 is provided. Bottom ui
The scanning light emitted from the window 5 is emitted upward.
It is. Running the bar-coded article from different directions
The light emitted from the bottom window 5 is scanned to scan the light.
Scanning light is emitted slightly inclined to the side window
Then, the merchandise passing over the bar code 1 is scanned. bar
Side scanner 2 and bottom constituting code reader 1
Each of the scanner units 3 generates scanning light therein.
Optical system for Configuration of each optical system
The details will be described later. In the figure,
Reference numeral 6 denotes a dip switch.
Used to set the seed operation. 7 is a squirrel
The start switch is used to reset the operation of the barcode reader 1.
Use this switch when setting. Also, in FIG.
Is not shown, but the bar code reader
LED for notifying whether or not barcode reading is possible
Display device or a speaker that emits a notification sound
Have been. Further, the barcode reader according to the present embodiment
The surface provided with one bottom window 5 is a scale.
The product is placed on this position
The weight of can be measured. Product price is the product weight
If the product is compatible with
Thus, the price of each product can be determined. FIG.
Means that the barcode reader according to the present embodiment
Installed on a counter (checkout counter)
Is illustrated. Counter surface of settlement counter 11
12 and a bar code reader provided with a bottom window 5
Bar code so that the upper surface 13 of the
The reader 1 is set on the settlement counter 11. for that reason,
The lower part of the barcode reader 1 is buried in the settlement counter 11
It will be embedded. The operator has a checkout counter
Standing at a position facing the side scanner unit 2
-Pass the bar code reader on the bar code reader 1
The product is scanned by the scanning light,
The bar code attached to the product is read. The payment cow
Center surface 12 and bottom window surface 13 are flush with each other.
The operator should touch the checkout counter surface.
While passing the product over the barcode reader,
You can also read the code. FIG.
Fig. 2 is a side cross-sectional view of the code reader, showing the arrangement of an internal optical system.
And the path of the light emitted from the laser light source.
You. In the figure, 21 is a VLD module. VL
The D module 21 is a light source that generates scanning light,
It has a body laser. In the case of FIG.
21 is near the lower surface on the right side of the figure, from the side scanner
Installed at the farthest position, facing left
To emit a laser beam. Bar code library according to the present embodiment
The reader has one light source, but has two reading windows.
Is emitted from the VLD module 21 on the way.
Laser light is split and emitted from each reading window
It generates scanning light. 22 is a half mirror,
Part of the laser light emitted from the VLD module 21
By reflecting and partially transmitting the laser light,
It is divided into books. 23 and 24 are reflection mirrors,
The laser light reflected by the
What is reflected and introduced into the polygon mirror 25 described later
It is. A small rectangular mirror is used as the reflecting mirror.
Have been. Reference numeral 25 denotes a polygon mirror for reflecting a plurality of sheets.
In the case of this embodiment, four reflecting surfaces are provided.
The polygon mirror 25 is attached to a polygon motor
And is rotationally driven by a polygon motor. Polygo
The reflection surface of the mirror 25 is transmitted through the half mirror 22.
Laser beam or half mirror 22 / reflection mirror 2
The laser beam reflected by 3.24 is converted to a polygon mirror
-25 from different directions. Polygo
The mirror 25 is driven to rotate as described above.
Each ray reflected on the reflecting surface of the rigon mirror 25
The light is scanned in an arc. Polygon Mira
The reflection surface of the -25 is inclined at a predetermined angle.
Therefore, the reflected laser light is reflected toward a predetermined angle.
Have been. Also, the inclination angles of each reflecting surface were different
It is set to be an angle. In addition, polygon mirror
The angle of the reflective surface of -25 is different for all reflective surfaces
No need. 26 is a mirror system A, 27 is a mirror system B
You. Each mirror system is a combination of multiple mirrors.
It is composed of Each mirror system is a polygon mirror 2
5 divides the scanning light scanned into a plurality of scanning lines
However, it does not increase the number of scanning lines emitted from the reading window.
You. In addition, the scanning direction (corner) of the scanning line emitted from the reading window
Configure each mirror system so that the degree is in various directions
The direction and inclination of the reflection surface of the mirror are set. Mi
After passing through the half mirror 22, the mirror system A26
The scanning light reflected by the reflection surface of the rigon mirror 25 enters.
And this scanning light is almost upward from the bottom window 5.
It is reflected so that it is emitted toward. On the other hand, mirror system B2
7 is provided by a half mirror 22 and reflection mirrors 23 and 24
After being reflected, the reflection surface of the polygon mirror 25
The emitted scanning light is incident, and this scanning light is
The light is reflected so as to be emitted in a substantially horizontal direction from c4. This
From side window 4 and bottom window 5
The emitted scanning light passes over the bar code reader 1.
The bar code is illuminated toward the article and scanned. Ba
-The scanning light that scans the code surface is
Reflected, side window 4 or bottom wing
The light enters the bar code reader from the dough 5. each
The reflected light from the barcode that enters through the reading window
Follow the same path from which the light was emitted
To the mirror 25, and the reflection surface of the polygon mirror 25
Is reflected. Next, the bar code of the reflected light from the bar code
The incident path to the reader 1 will be described. In FIG.
And 28 is a detector B through the bottom window 5.
From the barcode incident on the barcode reader
It detects light. Light receiving surface of detector B28 is shown
The right side, that is, the direction opposite to the side scanner
You. Reference numeral 29 denotes a detector A, and the side window 4
From the barcode incident on the barcode reader via
It detects reflected light. Light receiving surface of detector A29
Is directed obliquely downward and rightward in the figure. These detectors 2
The reflected light from the bar code received by
After being processed by the demodulation circuit.
External device (eg, POS terminal
Output). Here, reference numeral 30 denotes a concave mirror,
The bottom toe reflected by the reflecting surface of the Gon mirror 25
The reflected light from the bar code entering from window 5 is detected.
The light is focused on the light receiving surface of the detector B28. barcode
Since the light reflected by the surface is scattered light, the bar code
The reflected light incident on the reader also has a certain spread. So
Therefore, the reflected light that reaches the light receiving surface of the detector as it is
The bar light is read because the light quantity of
Cannot obtain sufficient light quantity. Therefore, in FIG.
The bar code reader uses the concave mirror 30 to detect the detector B2.
8 is designed to increase the amount of reflected light received
You. The concave mirror 30 is a bar code that enters from the left side in the figure.
By reflecting these reflected light toward the left side of the figure,
And folds the reflected light. Also, the concave mirror 30
A through hole 31 is provided in the center, and VLD
Laser light emitted from module 21 is a through hole
The light passes through 31 and is incident on the polygon mirror 25. Above
The scanning light is emitted from the bar code as reflected light
Incident on the detector through the same path as the path. That
In order to read the bar code most efficiently,
The light emitted from the LD module 21 and the light entering the detector B28
The optical axis of the reflected light to be emitted must be coincident with each other.
You. Therefore, the concave mirror is emitted from the VLD module 21.
Must be placed on the optical axis of the laser beam to be
It must not obstruct the optical axis of the emitted light. That
Therefore, the center of the concave mirror 30 shown in FIG.
Is provided. 32 is a Fresnel lens.
From the bar code incident from the side window 4
Collect the reflected light. This action is the same as that of the concave mirror 30 described above.
The same. The reflection mirror 2 is provided in front of the Fresnel lens 32.
4 are arranged and reflected by the reflection mirror 24.
From the emitted light and the bar code incident on the Fresnel lens 32
Also coincides with the optical axis of the reflected light. However, as mentioned earlier,
The reflected light from the barcode has a spread,
Only a part of the light incident on the Fresnel lens 32 is a reflection mirror
-24, only reflected by the bar code
Most of the light enters the Fresnel lens 32. Fresnel
The lens 32 receives reflected light from the polygon mirror 25.
It is arranged at an angle to the corner. Fresnel lens 3
The reflected light collected by 2 is the bottom of the barcode reader
Is reflected upward by the C mirror 33 provided in the
And reaches the light receiving surface of the detector A29. Where the mirror
System A26, concave mirror 30, detector B28 is a bottom scanner
And the reflection mirrors 23 and 24, the optical system B27,
The Rennel lens 32, mirror C33, and detector A29 are
A scanner unit. VLD module 2
1. Half mirror 22, polygon mirror 25 is bottom
Shared by the scanner unit and the side scanner unit.
The bar code reader according to the present embodiment further includes a bar code
A printed circuit board 34 is provided on the bottom surface of the reader 1.
You. On the printed circuit board 34, for example, the lighting of the laser is controlled.
Circuit, detector operation control circuit, polygon mode
Circuit that controls the rotation of the
Demodulation circuit that demodulates barcodes based on reflected light
Is installed. The printed circuit board 34 includes external devices
A connector for connection is provided, and a cable
(I / F cable 35 in the figure) is connected and demodulated
Output of code data is performed. Fig. 4
Scanning light emitted from the reader scans the barcode surface
FIG. As illustrated in FIG.
The horizontal direction from the side window 4 (or
The scanning light is emitted (toward the upper side). Meanwhile, the bottom
The light is emitted from the window 5 in an obliquely upward direction. bottom
The light emitted from the window 5 is slightly
Since the light is emitted while being tilted to the side, the side in FIG.
Emitted from both window 4 and bottom window 5
Scanning light is collected. Therefore, the barcode is
Each item can be read by passing
The scanning light emitted from the window simultaneously (or sometimes
Can be scanned from different directions of the article)
You. Therefore, the barcode is not facing one reading window.
Scanning light emitted from the other reading window
Scanning the bar code
The probability can be increased. In addition, the bar code side
The scanning light to be scanned is reflected by the bar code surface,
The emitted light is scattered as shown in FIG. Therefore, illustrated
As shown in position b, the barcode is
And in the almost vertical position, the side opposite to the side window 4
Even if the camera is facing
The part (illustrated d) reaches the bottom window 5. In particular,
The scanning light emitted from the bottom window 5 is obliquely upward.
Since the light is emitted toward
When scanning a barcode, the
The probability that the incident light enters the reading window (bottom window 5) is
Get higher. Thus, pass over the barcode reader
Scanning light scans the barcode surface from various directions of the article
Therefore, as shown in FIG.
In a position where it is not oriented and does not receive any scanning light
Unless there is a barcode, barcodes can be read
It is possible. FIG. 5 shows a bar code reader according to the present embodiment.
It is the figure which showed the outer dimension of a da. Barco according to the present embodiment
Reader is about 292mm wide and about 24mm high
7 mm. Also, the depth of the barcode reader is approximately
508mm (or 430mm), count from bottom
The height to the surface is about 120 mm. barcode
The depth of the reader is the settlement where the barcode reader is installed
The size may be set according to the width of the counter or the like. FIG.
Diag of the optical system of the barcode reader according to the present embodiment
It is a drawing showing a ram. In the figure, the arrow indicates the ray path.
A road is shown, and the direction of the arrow indicates the light emitting direction.
FIG. 6 shows the internal configuration of the barcode reader 1 as a side scan.
The drawing is divided into a scanner section 2 and a bottom scanner section 3.
Also, actually, a VLD module (VLD ASS in the figure)
Y) Although 21 is shared, it is separately illustrated in FIG. 6 for convenience.
Has been. The VLD AS of the side scanner unit 2
It is assumed that SY21 includes a half mirror. Bo
For the Tom Scanner part 3, the VLD module 21
The laser light emitted from the polygon mirror 25 (Po in the figure)
(LYSYN ASSY) and the polygon mirror 25
Is reflected by the reflecting surface of After this, the mirror system A26
(Mirror ASSY in the figure)
Window 5 (Window ASSY in the figure)
To the bar code. Two bottom windows 5
It is composed of a glass plate
Is sealed to prevent entry into the
You. Here, the glass is hard glass such as sapphire glass.
Although a lath is used, by contacting the product
The surface of the glass may be scratched or dirty, and the laser light may not pass through.
There is a possibility that the amount of excess light will decrease. Therefore, the bottom ui
Use window glass for window 5 to make contact with goods
For the lower glass where there is no possibility, secure it to the
For the top one that is very likely to touch the item
It can be replaced as needed. This will
Change the windowpane that has been used and pass through the bottom window 5
Bar code reading performance due to reduced amount of laser light
The bottom can be prevented. The possibility of contact with the product
For lower lower glass, the surface may be damaged.
Lower than the side glass. Therefore, the lower glass
Hard but expensive gas such as sapphire glass
It is not necessary to use a lath. Although details will be described later,
4 scan lines in one direction from Tom Scanner 3
Scan pattern is illuminated in a total of 10 directions
Is done. The scanning pattern in these 10 directions is a polygon mirror
25 is emitted every rotation, for a total of 40 runs
The bar code is scanned by the scanning line. What
The four scanning lines that make up each scanning pattern are
Corresponding to each reflection surface of the polygon mirror 25. bar
Light reflected from the cord is transmitted through the bottom window 5
Incident on the lens system A26 and reflected toward the polygon mirror 25
Is done. Thereafter, the reflecting surface of the polygon mirror 25
Light reflected from the bar code is reflected by the concave mirror 30.
Detector B28 (pin (PIN) photodiode in the figure)
The light is condensed and reflected toward C). Meanwhile, the side scanner section
2 is emitted from the VLD module 21 and
The laser light reflected by the
(B mirror group 23 in the figure)
Is introduced into the mirror 25. On the reflection surface of polygon mirror 25
The reflected scanning light is transmitted to a mirror system B27 (Mirro in the figure).
r ASSY) is reflected by the side window 4
(Window ASSY in the figure)
The code is scanned. Side window 4 is also a bottom window
Like window 5, it is composed of two panes.
You. In the case of the side window 4, the product is
Read the barcode so that it touches window 4
Because it is hard to take, normal glass instead of hard glass
May be used. From the side window 4, each direction 4
A total of 24 scanning patterns in six directions in each direction
Are emitted. This will be described in detail later.
You. The reflected light of the bar code passes through the side window 4
Incident on the barcode reader 1 and the mirror system B27,
After being reflected by the reflecting surface of the
The light is focused by the lens 32. And the bottom mirror 33
(C mirror), reflected by detector A29
Is done. The configuration of the Fresnel lens + bottom mirror is
It is perfectly acceptable to replace it with a concave mirror that has a focusing function.
There is no. In the figure, “disturbance light sensor 36” is
Detects changes in the amount of light around the reader and uses the results to determine
Barcode reader operation control, especially VLD module
This is for performing lighting control or the like. Subsequently, the present invention
Further details of the optical system of the barcode reader according to one embodiment
A detailed arrangement will be described. Figure 7 shows a barcode reader
It is the figure which showed the state which removed the cover of the lower surface. Ma
In FIG. 7, the upper cover (bottom win) shown in FIG.
Dough) is also removed
You. Here, the bottom glass refers to two window glasses
Out of the glass. FIG.
Shows the side and top views of the barcode reader shown in FIG.
FIG. In the figure, the bottom scanner unit 3 is configured.
The mirror constitutes the side scanner section 2 in FIG.
The mirrors are provided inside of FIG. Ma
In addition, the lower frame 41 and the upper frame 42
It is divided up and down by position. Lower frame 41 and upper frame
The bottom scanner unit 3 is formed on the inner wall of the
Mirror is attached. Also, side win
The cover 43 provided with the dove 4 is positioned at a position D in the drawing.
-It is divided from the code reader lower frame 41 and
A mirror that forms part of the mirror system B27 is attached to
The mirror frame 44 to be mounted is attached. FIG.
Bar code reader divided vertically at position C in FIG.
4 is a drawing showing an example of the device lower frame 41 in the state.
The cover 43 of the side scanner is also not shown in FIG.
Has been removed. Of the lower frame 41 of the barcode reader
A polygon mirror is arranged substantially at the center. What
In FIG. 9, the table 51 on which the polygon mirror is installed is shown.
However, the polygon mirror itself is not shown.
You. On the lower surface of the table 51, the reflection mirror 23
Gap 52 for passing the laser beam toward
Is provided. The lower frame 41 has a mirror
Mirrors constituting the mirror system A26 or the mirror system B27
However, a total of nine pieces are attached. Of these, ZB2,
VBRR, VBLL, HBR2, HBL2, ZML2,
ZMR2 is a mirror constituting the mirror system A26. one
On the other hand, VSR1 and VSL1 are each a mirror system B27.
Unit. The mirrors ZMR2 and ZML2 are
It is attached to the side of the frame 41,
Provided along the longitudinal direction of the radar. Also, mirror ZB
Reference numeral 2 is arranged so that its reflection surface faces upward. Z
The angle of the reflection surface of B2 can be appropriately adjusted. Mi
And VBRR and VBLL are on the side of the lower frame 41.
On the surface farthest from the scanner, a polygon mirror
In the opposite direction, the reflective surface is placed with a slight
Have been. On the other hand, mirrors VSR1 and VSL1
With the reflective surface slightly obliquely upward on the side of the
It is attached. Reference numeral 53 denotes a printed circuit board,
An alarm A29 is attached to a part thereof. Illustrated
As shown in the figure, the printed circuit board 53 receives light from the detector A29.
Install it on the lower frame 41 so that the surface faces obliquely downward.
Is attached. By taking such an arrangement
Thus, the depth of the device can be reduced. Also,
Tilt between the printed circuit board 53 and the polygon mirror
The installed Fresnel lens 32 is attached.
Further, a reflection mirror is provided on the optical axis in front of the Fresnel lens 32.
24 are provided. On the other hand, on the lower surface of the mirror ZB2
Contains the VLD module, and from this position
Laser light is emitted. Also, behind the mirror ZB2
On the side (left side in the figure), a reflection mirror 23 is attached.
Through the gap between the mirror ZB2 and the lower frame 41.
The laser light is reflected toward the reflection mirror. Also the detector
B is embedded on the lower surface of the device, at the position of A in the figure.
You. The light-receiving surface of detector B faces the left side in the figure.
On the front side of the light receiving surface of B, there is a laser beam reflected by the concave mirror.
An opening 54 for guiding the light to the detector B is provided. Open
The school 54 matches the optical path where the reflected light is collected by the concave mirror.
Together, they are formed in a V-shape. Detector B is pre-
Mounted on a printed circuit board (shown in b). Figure 10 is below
It is a figure which shows the state which looked at the part frame from the upper surface. As well
FIG. 11 is a side sectional view of the lower frame. FIG.
Alternatively, as shown in FIG.
The polygon scanner is slightly
Is provided. The Fresnel lens 32
Behind the bottom mirror 33 has its reflective surface slightly upward.
It is installed. On the other hand, on the bottom of the lower frame 41
Is equipped with a detector B28. Detector B28
Are mounted on the printed circuit board b. Also, detection
A substantially V-shaped opening is formed on the light receiving surface side of the container B28.
Portion 54 is provided, and reflected light from the concave mirror 30 is
The light enters the detector B28 through the opening 54. Also, V
LD module 21, reflection mirrors 23 and 24, Fresnel
Lens 32, polygon mirror 25, detector A29, detection
The container B28 and the concave mirror 30 are respectively connected to the lower frame 41.
Located on the center line, the optical axis of each ray coincides
It has been like that. VLD module 21, concave mirror 30
Is arranged on the lower surface of the mirror ZB2. In addition, Mira
-For some of ZB2, the arrangement of the VLD module 21 is unknown.
It is cut away in FIG. In FIG.
As shown in the lower frame side sectional view, the detector B28
Is located on the bottom surface of the lower frame 41,
It does not block the optical path of light reflected from the board. Ma
The mirror ZB2 is mounted slightly upward to the right
I have. The reflection mirrors 23 and 24 are at the tip of the elongated frame.
To prevent the passage of light rays as much as possible.
It has been. In addition, the bottom and sides of each mirror
Abutment for defining mirror position / angle (illustrated
c) is provided. Attach mirror to lower frame
If you want to attach the mirror,
Set. This allows each mirror to be oriented
-It is attached to the lower frame 41 at an angle. FIG.
This figure shows the upper frame of the device, and the lower frame
Are also shown at the same time. Each mirror is a top frame 4
It is pasted on the inside of 2. The upper frame 42
ZBR1, ZBL1, HBR1, HBL1, VBR1,
VBL1, VBR2, VBR2, ZMR1, ZMR2
It has a total of 10 mirrors. These mirrors
These also constitute a part of the mirror system A26. Izu
These mirrors also have a slightly lower reflecting surface and lower frame.
Mirrors that make up the bottom scanner attached to the
It is arranged toward. Figure 13 shows the side scanner
Frame 4 attached inside the cover part 43
FIG. 4 is a four-sided view of FIG. Inside the mirror frame, ZH
R, ZHL, ZRR, ZLL, VSR2, VSL2, Z
A total of eight mirrors, R and ZL, are attached. This
These eight mirrors constitute a part of the mirror system B27.
I have. In the side view of FIG. 13, the operator's standing is on the left side of the figure.
Position side or side window side
You. Of the eight mirrors, the reflecting surfaces of the mirrors ZR and ZL
It faces diagonally upward, and the reflection surfaces of the remaining six mirrors are slightly
Or downward. 6 sheets other than ZR and ZL
The reflecting surfaces of the mirrors are slightly facing each other
You. FIG. 14 shows a mirror attached to the mirror frame 44.
Of the upper six mirrors of the mirror
It is a drawing which shows the rough position of. These six mirrors
Is the attachment surface provided inside the mirror frame 44
Is attached using an adhesive or the like. FIG.
Frame 41, upper frame 42, cover 43, Mira
-A bar code reader with the frame 44 assembled
It is a side sectional view. As shown in FIG.
The reflection surface of the mirror attached to the
It is facing downwards and is attached to the upper frame.
Light reflected from the lens was attached to the lower frame 41
Light enters the mirror. Also attached to the mirror frame 44
Of the reflecting surfaces of the mirrors ZR and ZL
Of the mirrors VSR1 and VSL1 attached to the
The reflecting surface positions are located at approximately the same height. In FIG.
Detector A29 is arranged so that its light receiving surface faces downward.
And the printed circuit board is
It is arranged so as to be substantially perpendicular to the die. this
The printed circuit board should be leveled
Reduce the depth of the device compared to when
Can be. Also, a bar is attached to detector A29 and detector A29.
Fresnel lens 32 to introduce light reflected from cord, bottom
The surface mirror 33 is a mirror VSL from the polygon mirror 25.
Does not block the path of scanning light reflected toward 1, ZL, etc.
Position. FIG. 16 shows the bottom scanner unit 3
FIG. 17 shows the light emitted from the reading window of the side scanner unit 2.
3 is a diagram showing an outline of a scanning light path to be performed. Bottoms
In the case of the canner part 3, the light is emitted from the VLD module 21.
The ray reflected by the reflecting surface of the polygon mirror 25
First, the ZB attached to the upper frame 42
R, ZBL, HBR, HBL, VBR1, VBL1, V
Scanning is performed on BR2, VBL2, ZMR1, and ZML1.
In the order of scanning, the polygon mirror 25 was rotated clockwise.
In the case, ZMR1, VBR2, VBR1, HBR1,
ZBR1, ZBL1, HBL1, VBL1, VBL2,
The order is ZML1. Then, the inside of the upper frame 42
The reflected light reflected by the mirror is transmitted to the lower frame 41.
Irradiates towards the attached mirror. ZMR1
The more reflected scanning light is reflected upward by ZMR2.
From the bottom window 5 as a scanning pattern ZMR.
Is emitted. Reflected by VBR2 and VBR1
The scanning light is respectively reflected upward by the VBRR,
Scan pattern VBL2, VBL1 from Tom window 5
Is emitted. Running from VBR2 to VBRR
Scanning light and scanning light incident on VBRR by VBR1.
Is different from the bottom window
C) emitted as scanning light having different directions and angles from
It will be. Also, the scanning light reflected by the HBR
Is reflected upward by the HBR2 and the bottom window
From 5, the scanning pattern is emitted as HBR. ZBR
1 is reflected upward by ZB2.
Reflected, the scanning pattern ZBR from the bottom window 5
Is emitted. ZBL1, HBL1, VBL1, V
The same applies to the case of BL2 and ZML1.
The scanning light is reflected upward by ZB2 and the scanning pattern ZB
L is emitted as L, and the scanning light by HBL1 is transmitted to HBL2.
The light is reflected upward and becomes the scanning pattern HBL. Also,
The scanning lights reflected by VBL1 and VBL2 are mutually
VBLL reflected upwards, each scanning pattern
VBL1 and VBL2. Then by ZML1
The reflected scanning light is reflected upward by ZML2,
Is emitted as a scanning pattern ZML and one scanning cycle
Ends. Here, as illustrated in FIG.
The scanning light reflected by the mirror ZML1 is in the bottom scanner unit.
To reach the mirror ZML2. This
As some scanning light crosses the bottom scanner,
In the bottom scanner, remove any obstacles and block the scanning light.
It is necessary to provide a space that does not exist. Therefore, this implementation
In the bar code reader according to the form, for example, as shown in FIG.
So that the VLD module 21, the concave mirror 30, etc.
Detector B28 is attached to the bottom of the device.
It is. The polygon mirror 25 is also located in the bottom scanner section.
It is installed in a position where it does not block the space. Ma
In addition, the mirrors that make up the bottom scanner
Inner walls of the lower frame 41 and the upper frame 42
Attached to. For this reason, it is
Must be installed in the space of the bottom scanner
There is no bottom scan due to this mirror arrangement.
The space in the corner can be used effectively. on the other hand,
Regarding the side scanner unit 2, the polygon mirror 25
Therefore, the reflected scanning light is attached to the lower frame 41.
VSR1, VSL1 and mirror frame 44
The light first enters the attached ZR and ZL. The scanning order is
VSL1, ZL, ZR, and VSR1 in that order. these
The scanning light reflected by the mirror is then mirror reflected.
The upper six mirrors attached to the
Fired. First, the scanning light reflected by VSL1
Is almost horizontally reflected by the VSL2,
Emitted from window 4 as scanning pattern VSL
You. The scanning light reflected by the ZL is first applied to the ZLL mirror.
And the scanning pattern ZL from the side window 4
It is emitted as L. And subsequently reflected by ZL
Scanning light reflected by the ZHL
4 is emitted as a scanning pattern ZHL. continue,
The scanning light reflected by the ZR is first reflected by the ZHR.
From the side window 4 as a scanning pattern ZHR.
Is emitted. Next, the scanning light reflected by the ZR is Z
RR reflected from the side window 4
The light is emitted as a turn ZRR. Finally, VSR1
The reflected scanning light is reflected by VSR2 and
Emitted from window 4 as scanning pattern VSL
You. Thus, one scanning cycle is completed. Figure
18 is a scanning pattern emitted from the bottom window 5
FIG. As already mentioned, the bottom win
From the dough 5, a total of 40 scanning lines are emitted. Forty
Scan lines are grouped into 10 groups every 4 lines.
Have been. FIG. 19 shows the scanning pattern shown in FIG.
From the bottom, each representing one scanning line
FIG. 6 is a drawing showing a locus of a scanning pattern on a window surface.
You. The two scanning patterns ZMR and ZML are operated by the operator.
Of the bottom window 5
It extends over almost the entire area in the longitudinal direction. Therefore,
-Items to be read are placed on the bottom window 5
, At least the scanning patterns ZMR and Z
Scanned by ML. The remaining eight scanning patterns are
In the direction crossing the scanning patterns ZMR and ZML,
Scanning is performed by drawing a locus that rises slightly obliquely. FIG.
By emitting a scanning pattern as shown in
The angle of the barcode passing through the barcode reader
The scanning lines that make up one of the scanning patterns
Barcode can be scanned, and barcode readability
Performance can be improved. Where each scanning pattern
The reference numerals attached to each constitute the mirror system A26.
A mirror that corresponds to the mirror name and has the corresponding name
Is reflected by Also, the polygon mirror
Since the angles of the reflecting surfaces are different,
Scan pattern corresponding to each reflection surface emitted from window 5
The four runners correspond to the angle of the reflection surface of the polygon mirror.
Scan the scan line at a predetermined distance, almost parallel
You. In this way, a plurality of scanning lines separated by a predetermined distance
By configuring one scanning pattern,
The probability that the scanning line scans the barcode can be increased,
The barcode reading performance can be further improved.
FIG. 20 shows a scanning pattern emitted from the side window 4.
FIG. From side window 4
Are four scanning lines that are almost parallel and are separated by a predetermined distance
6 scanning patterns (VSR, VSL,
ZRR, ZLL, ZHR, ZHL) are emitted. this
The names of the scanning patterns refer to the side scanner
This corresponds to the name of the mirror to be configured.
Similarly, they are reflected by mirrors with the same name
FIG. During one scanning pattern
Are emitted from the bottom window 5
As in the case of the scanning pattern, each of the polygon mirrors 25
The scanning position is defined by the difference in the angle of the reflecting surface.
I have. The scanning pattern shown in FIG.
It is a pattern on the c surface, but as described above, the mirror frame
Because the mirror attached to 44 faces inward
As you move away from the side window surface,
Scanning pattern approaches. And most Barco
6 scanning patterns are the most tangent at positions suitable for scanning
Approach and pass through the barcode reader according to the side pattern
Bar code is most likely to be scanned at this location.
You. Scanning pattern emitted from bottom window 5
Also the scanning pattern emitted from the side window 4
Are also arranged so that they are symmetrical about the center line.
ing. And both bottom pattern and side pattern
In addition, scan patterns of slightly different directions and angles
Pass over the barcode reader
Regardless of how the bar code is tilted, a small number of scan lines
Possibility of scanning at least one across barcode
Will be very high. FIG. 21 shows the bottom window 5
Emitted scanning pattern (bottom pattern) and side
Scanning pattern (side pattern) emitted from window 4
And only one side (left side) pattern
FIG. As described above, each reading window
The left and right scanning patterns emitted from the
The scanning pattern on the right side is shown in FIG.
The pattern shown in FIG.
FIG. 21A shows the scanning pattern VSL among the bottom patterns.
1 and VSL2 are shown. VSL1 is
Scanning rail slightly rising to the right near the id window
Draw a trace. On the other hand, VSL2 is more operator than VSL1.
The scanning position is slightly higher right like VSL1.
Draw a trajectory. FIG. 21b illustrates the scanning pattern ZML.
ing. ZML extends the longitudinal direction of the bottom window approximately
Draw a path that traverses. This allows the article to be
No matter where you pass through window 5, you must run at least
The article is scanned by the inspection pattern ZML. FIG. 2
1c is a drawing illustrating the scanning patterns HBL and ZBL.
You. For HBL, the size on the left side of the bottom window
Draws the scanning trajectory slightly upwards to the left
And scanned. On the other hand, ZBL is on the right of the bottom window
The position near the operator on the side
It is scanned in a trace. Figure 21d is a side window
Of the scanning pattern emitted from the
FIG. The scanning pattern VSL is
The scanning gauge extends in the vertical direction of the window and rises slightly to the left.
Draw a trace. Also, the scanning pattern ZLL is a running
Draw a trajectory. In addition, ZHL is near the side window.
Draw a scanning trajectory that rises slightly to the upper right of the center of the box. This
By generating a scanning pattern like
Polygon mirror for articles passing through the code reader
Each time 25 completes one rotation, a total of 64 scanning lines from two directions
Is irradiated. The number of scanning lines for scanning articles is large,
If the scanning direction and angle are set in various directions
The higher the probability that the scanning line passes through the barcode surface
And the barcode reading may be successful.
Get higher. FIG. 22 is a side sectional view of the barcode reader.
Laser light emitted from the VLD module 21
FIG. In the case of the figure, the upper
Mirror mounted on frame 42, mirror frame 4
The mirror attached to 4 is not shown.
You. The VLD module 21 has an emission angle of the laser light.
A prism 61 for converting the beam diameter,
A half mirror 22 for dividing the laser light into two. Pre
Laser that passed through the mirror 61 and passed through the half mirror 22
The light is emitted in a slightly upward direction, and is located at the center of the concave mirror 30.
After passing through the through hole 31 provided, the polygon mirror
-25. Reflected by polygon mirror 25
The laser light to be transmitted is a mirror constituting the bottom scanner unit 3.
Irradiated at the group. On the other hand, the half mirror 22
The reflected laser light is reflected by the mirror ZB2 and the lower frame.
The light enters the reflection mirror 23 through the gap between the reflection mirror 41 and the reflection mirror 23.
After being reflected by the mirror 23, the polygon mirror 25
Through the gap 52 under the table 51 where the
-24. From the reflection mirror 23 to the reflection mirror 24
Are emitted in a substantially horizontal direction.
The reflection mirror 24 converts the incident laser light into a polygon mirror.
The light is reflected obliquely upward toward 25. Polygon mirror 2
5 enters the mirror of the side scanner unit 2
The light is reflected toward a group of mirrors constituting the system. Polygon
Each scanning light reflected by the mirror 25 is shown in FIG.
Is emitted slightly obliquely above the horizontal.
The reflection direction of the reflected light from the polygon mirror 25 is polygon
It is determined according to the angle of the reflection surface of the mirror 25. FIG.
Is a perspective view of the lower frame 41 of the barcode reader.
Of the laser light emitted from the VLD module 21
It is the figure which illustrated the route to the Gon Miller. The figure
In Figure 23, a poly
The Gon mirror itself is not shown and a polygon mirror is installed.
Only the table 51 to be mounted is shown. Also, the concave mirror is Mira
-Because it is provided below ZB2, it is not shown.
I have. As shown in FIG.
The reflected laser light passes through the gap 52 below the table 51.
Pass through to the reflection mirror 24, and by the reflection mirror 24
The light is reflected obliquely upward toward the polygon mirror 25.
On the other hand, the laser emitted through the through hole of the concave mirror
Light directly enters the polygon mirror. FIG. 24 and FIG.
25 is the lower frame 41, the upper frame 42, the side
With the cover 43 of the scanner 2 attached,
FIG. 23 is a side sectional view of the barcode reader, and FIG.
FIG. 24 shows the path of the scanning light emitted from the scanner unit 3.
The path of the scanning light emitted from the side scanner unit 2 is
Each is shown. As shown in FIG.
By the polygon mirror 25 through the through hole 31
The scanning light reflected by the bottom scanner unit 3 is reflected by the upper frame.
Once folded down by the mirror attached to the
It is reflected so as to be returned and attached to the lower frame 41.
The upper part of the bottom window 5 is
Reflected in the direction. For example, in the case of FIG.
The scanning light from the mirror 25 is incident on the mirror ZBL1,
The light is reflected by ZBL1 and enters mirror ZB2.
ZB2 reflects the incident scanning light obliquely upward and scans it.
Light is emitted from the bottom window 5. On the other hand, FIG.
As shown in FIG.
The scanning light reflected by the Gon mirror 25 is
Mirror VSL1 or mirror attached to
-Mirror ZL attached to frame 44
After being reflected toward the mirror frame 44
The other six mirrors, almost horizontally,
The light is emitted from the window 4. For example, in the case of FIG.
Indicates that the scanning light from the polygon mirror 25 enters the mirror ZL.
And is reflected upward (almost vertically). afterwards,
Incident on the mirror ZHL attached to the mirror frame
The scanning pattern Z is reflected by the horizontal
The scanning light constituting the HL is generated. FIG. 26 shows this embodiment.
Bar code readers and conventional bar code readers
Scanning pattern emitted from each bottom window
FIG. 26A is a scanning pattern according to the present embodiment.
26b and 26c respectively show a conventional barcode region.
2 shows a scanning pattern by the scanning method. Conventional barcode
Barcode reader according to the present embodiment compared to a reader
The scanning pattern emitted from the bottom window of
Are many, and the directions are directed in various directions. Obedience
In the case of the conventional example (1), the total number of scanning lines is 12, and the conventional example
In the case of (2), the total number of scanning lines is only 24. Follow
Therefore, the bar code reader according to the present embodiment
Bar code reading is more likely to be scanned
High performance. In addition, the bottom window according to this embodiment
C5 has a longer length than the conventional reader.
You. Therefore, pass the goods to read the barcode
The range of the bottom window 5 to be widened is widened. That
Therefore, the operability of the reading operation can be improved accordingly.
FIG. 27 shows a conventional barcode reader and this embodiment.
Difference in barcode reading range of barcode reader
FIG. The reading range shown in FIG.
For example, a barcode set up vertically is placed on a horizontal plane at 36
When rotated 0 °, be sure to read the barcode
Refers to the range in which Conventional barcode
In the case of a reader, the size of the reading window is 6 inches x 6 inches.
And the scanning window is short, especially in the depth direction.
The readable range is necessarily narrowed. And the reading area is
The operator depends on the side window 4 side,
Move the article closer to the side window 4 and pass through the article.
But some people may not be able to reach this range.
And the operability of the reading operation is not very good. to this
On the other hand, the barcode reader according to the present embodiment has a reading window
Is 4 inches x 7 inches, so depth direction
The readable range becomes wider on the operator side. for that reason,
Pass items within the readable range even for people with short hands
It will be easier. In addition, place where article passes on bar code
If the length of the reading window in the depth direction is longer,
Scanning light emitted from the scanner is more likely to scan the article
You. However, the length in the width direction, that is, the
Regarding the matching direction, even if there is not much width, the reading performance
There is no problem for. On the other hand, sapphire glass is expensive
The price increases as the area increases. That
Therefore, a 6-inch wide reading window is disadvantageous in terms of cost.
And have an unnecessary width. On the other hand,
The reading window according to the present embodiment is necessary for maintaining the reading performance.
It has a required 4-inch width, which may degrade reading performance.
And keep the price of glass from rising
It also has the advantage that it can be done. FIG. 28 shows the present embodiment.
From a barcode in a barcode reader
FIG. 4 is a drawing showing the path of reflected light,
It is shown from where the reflected light from the barcode is incident.
You. The reflected light incident from the bottom window is
After being reflected by A, it enters the polygon mirror 25.
You. The beam reflected by the reflecting surface of the polygon mirror 25
The reflected light from the code enters the concave mirror 30. Concave
Reflected light from polygon mirror 25 is reflected by mirror 30
The light is collected and received by the detector B28. On the other hand,
The reflected light incident from the window is reflected by the mirror system B.
After that, the light enters the polygon mirror 25. Polygon Mira
Bar code reflected downward by the reflective surface of
These reflected lights enter the Fresnel lens 32. Freine
Lens 32 collects the reflected light from the polygon mirror 25.
The light is incident on the bottom mirror C33. Bottom mirror C3
3 is from the bar code toward the light receiving surface of the detector A29.
The reflected light is reflected. FIG. 29 shows a polygon mirror
The relationship of the optical path length up to the position where the laser beam can be narrowed down is shown.
It is a drawing. In FIG. 29, a b cd is the side
FIG. 5 shows scanning light emitted from the window 4 and e
fgh is the scanning light emitted from the bottom window 5
Is shown. Here, in the device of FIG.
The optical path length of b cd is greater than the optical path length of e fgh
Is also getting longer. This is because the laser light source (LD shown)
This is because it is provided at the lower left of the figure. Shape the beam
Lens and aperture (detailed description will be described later)
If it is close to the light source, the laser beam
-The code reading area depends on the distance from the laser light source.
It is determined. Therefore, bar code reader of laser light source
The mounting position in the
Will contribute to the decision. In the case of FIG.
The distance from the beam to the position where the beam can be narrowed most is h for d.
However, due to the arrangement of the laser light source,
Abcd and ef based on Gonmirror 25
The two optical path lengths gh change. a b c d
The optical path length difference between efgh and
A'a optical path length to the mirror, and
A'-a "e" to the polygon mirror via the line a '
Is absorbed by the difference from the optical path length. FIG. 29
In the case of, the length of the reading window in the depth
The case where it is not long is illustrated. Meanwhile, the depth of the reading window
When the length in the moving direction becomes longer, the mirror f is moved to the position shown in FIG.
Cannot be mounted in the same position as That is, reading
Move the mirror f to the right in the figure as the length of the window increases.
Otherwise, the mirror f will interfere with the scanning light path.
This is because it hinders the emission of the scanning light. That
Therefore, in the case of FIG. 30, the mirror f is
Shown to the right. Light from laser source to point d
The path length and the optical path length to the point h are equal, but the mirror f is
Has moved to the side, the optical path length of abcd
In addition, the optical path length of e fgh becomes longer. That
Therefore, in the case of FIG. 30, the laser light source is
Cannot be installed. Therefore, according to the present embodiment
In a bar code reader, the laser light source is a bar code reader.
It is installed on the right side of the figure. With such a light source arrangement,
The relationship between the optical path length of abcd and the optical path length of efgh
The difference is absorbed by the optical path length difference between a'a "a and a'e.
Can be made. The side scanner unit 2 is a scanning mirror
System, etc., so there is enough space inside
Can not take. Therefore, the emission light of the laser light source
In order to increase the optical path length of the
It is difficult to route the light. The device according to the present embodiment
In the case of the device (FIG. 30), the laser light source is
Laser for adjusting the optical path length
Space for light routing can be secured. Ma
In the case of the present embodiment, the power is supplied to the side scanner unit 2.
The laser light passing through the lower surface of the polygon mirror 25.
And intersect with the rotation axis of the polygon mirror
You. If the laser beam supplied to the side scanner unit 2 is
When passing through the upper part of the polygon mirror 25,
For guiding the laser beam to the scanning optical system inside the scanner.
The problem that the arrangement of the mirror (mirror system B) becomes difficult
I will. However, in the case of the present embodiment, the polygon mirror
By letting the laser light pass beneath,
Titles are prevented. FIG. 31
It is the figure explaining an example of reflected light reception. FIG.
Is reflected by the polygon mirror 25 '.
The scanning light enters the pattern generating mirror 71 and is reflected downward.
Is reflected upward by the bottom mirror 72 and
The light is emitted from the window 5 '. Reflection from barcode
The light passes through the same path as the outgoing light,
And is reflected toward the detector 73. Polygon
The reflected light from the lens 25 ′ is collected by the lens 74.
Mirror 75 whose reflection surface is directed obliquely downward.
The light is reflected downward and is received by the detector 73.
It is. In the case of such a barcode reader, the mirror
Since the bottom mirror 71 and the bottom mirror 72 are arranged, the lens
74 can be very close to the polygon mirror 25 '
I can't. Therefore, the dimension in the depth direction of the barcode reader
Method cannot be made very small,
In this case, a depth of 450 mm or more was required. area
If the store is large, the width of the settlement counter is, for example, 55
The width can be about 0 mm. In this case,
-Even if you do not limit the width of the code reader,
It is possible to install a barcode reader on the Internet.
However, in the case of small stores, especially in Japan
Even when the settlement counter width is as narrow as 450 mm or 480 mm
is there. In this case, settle the barcode reader in Fig. 31
It cannot be installed on the counter. FIG. 32 shows a book
The arrangement of the light receiving element of the bar code reader according to the embodiment will be explained.
It is the drawing which was clarified. As already described, in this embodiment,
The detector B28 is provided on the bottom of the barcode reader.
Have been. Then, a polygon mirror is formed using the concave mirror 30.
The reflected light from 25 is sent to the middle of the barcode reader.
The light is reflected back. On the other hand,
In order to emit scanning light from window 5, a polygon mirror
The scanning light reflected by 25 is attached to the upper frame.
Once reflected downward by the mirror a
For example, provided on the concave mirror 30 and the VLD module 21
The light is reflected upward by the mirror ZB2. In this way,
FIG. 31 shows how to emit scanning light from the Tom window 5.
Without a mirror equivalent to the bottom mirror of
An optical system that contributes to the generation of scanning light is located on the bottom of the
Not. Therefore, the detector is located on the bottom of the barcode reader.
B28 can be placed, and the concave mirror 30 is used
Fold the reflected light reflected by the Gon mirror 25 inward
It can be reflected back. And such optics
Because of the system arrangement, the depth of the bottom window 5
Depth of device despite being 7 inches long
Direction length can be shorter than the conventional device,
In the case of the apparatus shown in FIG. 32, the apparatus depth is set to 440 mm or less.
can do. FIG. 33 is a concave mirror according to the present embodiment.
30 are a front view and a side view. Near the center of the concave mirror 30
Has a through-hole 31 as described above.
In addition, the concave mirror 30 can be used as a bar code reader with a concave mirror.
Attached to the mounting bracket 75 for attaching to the
Have been. The mounting bracket 75 is bent into a U-shape
The concave mirror 30 is shown by the elasticity of the mounting bracket 75.
Is biased to the right. The focal point of the concave mirror 30 is a detector
It is necessary to match the light receiving surface of B.
The focus of the concave mirror 30 is changed to the light receiving surface of the detector B due to an error or the like.
May get out of the way. Concave mirror according to the present embodiment
Can adjust its horizontal and vertical mounting angles
Equipped with various mechanisms. FIG. 34 shows a bar code according to the present embodiment.
It is the drawing which looked at the bottom of a dorida. Barcode reader bottom
On the surface, screw for adjusting the angle of the concave mirror
There are three. Adjusting screw α is vertical to concave mirror
This is a screw for adjusting the position. Adjustment screw β
Is a screw for adjusting the horizontal position of the concave mirror.
You. FIG. 35 is a drawing for explaining the angle adjustment of the concave mirror.
It is. The folded part 75 ′ of the mounting bracket 75 has two
A screw hole 76 is provided near the end, and a fulcrum near the center.
Hole 77 is provided. On the other hand, bar code readers
The frame 41 has a projection 78 and two stupid holes 79.
Have been. The hole 77 of the mounting bracket 75 is
The concave mirror 30 is fitted into the projection 78 of the first
It is rotatable horizontally in the center. Concave mirror 30
The horizontal alignment of is centered on the fulcrum (projection 78).
To rotate the concave mirror 30 so that the light receiving surface of the detector B has a concave mirror.
After adjusting so that the 30 focal points are located,
Therefore, the mounting bracket 75 is fixed to the frame 41.
You. On the other hand, the concave mirror 30 is
In the case of FIG. 35, it is urged to the near side in the drawing by elasticity.
ing. The tip of the adjustment screw α projects into the back of the concave mirror 30.
Has been applied. Adjust the vertical angle of the concave mirror 30
In order to adjust the extension of the adjustment screw α,
The concave mirror 30 is moved back and forth. This
By using a simple mechanism such as
Light reflected on the light receiving surface of detector B
It becomes possible to match. FIG. 36 shows the detector A
-The upper surface of the C mirror 33 to which the reflected light from the code is incident
It is a figure and a side view. Attach to the bottom of C mirror 33
A metal fitting 80 is attached. The C mirror 33 is a device
Attached to the frame via the mounting bracket 80
It is. The mounting bracket 80 is bent in a U-shape.
The C mirror 33 is urged downward by the elasticity of the bracket.
ing. Adjust the tilt and horizontal angle of the C mirror 33
It is possible. Figure 37 shows the bottom of the barcode reader
And the adjustment screw α and the two adjustment screws β
It is shown. Adjustment screw α adjusts the inclination of C mirror 33
The tip of the adjusting screw α is at the bottom of the C mirror 33.
Faced to the surface. Adjust the extension amount of adjustment screw α.
By adjusting the inclination of the C mirror 33,
The direction of reflected light can be adjusted. On the other hand, the tip of the adjustment screw β
The parts are provided near both ends of the mounting bracket 80, respectively.
Screwed through a stupid hole. Installation
The screw hole of the fitting has the same shape as the mounting fitting of the concave mirror
You are. The mounting bracket 80 is the same as the case of the concave mirror
It is possible to rotate in the horizontal direction around the fulcrum,
After adjusting the direction of the C mirror 33, use the adjustment screw β
The mounting bracket 80 is fixed to the device frame. Figure
38 is a bottom view of the bar code reader according to the present embodiment.
It is the drawing explaining five windows. Bottom ui
The bottom surface 81 provided with the window 5 has a triangular cross section.
A projection 82 extending in the lateral direction of the device is provided.
You. When scanning barcodes, read the barcode
Items through the space above the
May move the product by bringing the product into contact with the bottom.
You. In that case, the bottom surface provided with the bottom window 5
If the surface is flat, the contact area between the bottom and the article will be large.
The friction between the article and the bottom surface increases,
It is not easy to pass the goods. Such a question
In order to deal with the problem, the bar code reader of this embodiment
Is provided with a projection 82 on the bottom window surface 81 to
By reducing the contact area with the bottom surface,
81 and the frictional force is reduced. The direction in which the projection 82 extends
Is the same as the direction in which the article passes,
Can be realized more effectively. The protrusion 82 is provided on the bottom surface 8.
1 can be formed with a resin mold.
You can also attach a member that forms a protrusion on the bottom
No. In a barcode reader, scanning lines are most concentrated.
And the position with the highest reading probability (optimal reading position)
Exists. In the present embodiment, the protrusion 82 of FIG. 38 is used.
The operator to determine the optimal reading position.
Are easy to recognize. Part corresponding to optimal reading position
In (83 in the figure), the interval at which the projections 82 are arranged is reduced.
ing. On the other hand, the portion outside the optimum reading position (84 in the figure)
Then, the interval between the projections 82 is the interval between the projections at the optimal reading position 83.
More widespread. Thus the bottom window surface
The optimal reading position is determined by the distance between the projections 82 provided on the
The operator is notified of the optimal reading position,
Can be easily recognized. Also,
When passing a small article, for example,
Problems such as falling in between barcodes
Reading operability may be reduced. Therefore, the protrusion 8
It is desirable that the intervals between the two are not so far apart. to this
On the other hand, for the optimal reading position, the interval between the projections 82 is narrowed.
Operation when passing articles through the optimal reading position
It is also possible to improve workability. FIG. 39 shows the print
3 is a drawing illustrating an example of a substrate. Barcode Reader Pre
Photodetector circuit to which photodetectors A and B are connected
1, 2, VLD and motor to which VLD module is connected
Are connected, and the projector is connected through these
A control unit provided on the lint board controls the operation of each unit.
A power cable for supplying power is also provided on the printed circuit board.
Connector (power supply in the figure)
Transfer the bar code information to POS terminal etc.
For interface (I / F) cable
Kuta (POSTerminal1 in the figure), scale device
Power supply connector (Sc in the figure) for supplying power to the
ale), connect handheld scanner
Connector (handheld scanner in the figure)
And a connector to be connected to it. These connectors
Is provided on the main printed circuit board (Main PCB)
Often. Conventionally, as shown in FIG.
The imprint board 85 is provided on the back of the side scanner section 2.
Although it was installed vertically, in this case the connector 86
I will turn towards you. For this reason, the connectors 86
If a cable needs to be connected, the user should
In order to confirm the connector type,
You need to lift and tilt the barcode reader
Was. However, barcode readers are embedded in checkout counters, etc.
Since it is installed in a recessed type, it has a barcode reader.
It is very difficult to work
The workability of the cable connection was very poor. Fig. 41 is the real
The cable connection of the barcode reader according to the embodiment will be described.
It is a drawing. The barcode reader according to the present embodiment is
Main printed circuit board 85 is placed horizontally on the bottom of the device
The connector 86 is also facing the side. That
Therefore, when the user checks the connector type,
With the reader installed horizontally, connect the connector 8
6 can be confirmed and the connector connection work is efficient
Can be done. FIG. 42 shows a bar according to the present embodiment.
On the back of the code reader, various connectors are arranged horizontally.
FIG. On the back of the device
Is a power cable connector 8 to which a DC power supply is connected.
7. Equipped with an interface connector 88 and the like
You. FIG. 43 shows a state where the main printed circuit board 85 is mounted.
3 is a diagram illustrating a back surface of the bar code reader in the state. Step
The various connectors shown in FIG.
Tab 89 is attached. Also a barcode reader
From the motor cable connected to the polygon motor
(FIG. 44 shows the main printed circuit board 85
Shows the back of the barcode reader in the removed state),
These cables are connected to the printed circuit board 85.
FIG. 45a is a diagram illustrating the configuration of a laser module.
is there. The laser module includes a semiconductor laser 91 and a collimator.
A data lens 92 and an aperture 93. semiconductor
The laser beam emitted from the laser 91 has a predetermined divergence angle.
Diverged, so that the laser light
After squeezing the beam, the beam is shaped by aperture 93 and
-A laser beam is emitted to the code reading area. Where half
The laser light emitted from the conductor laser is shown in FIG.
The divergence differs between the vertical and horizontal directions.
You. The lateral direction has a divergence angle of about 5 ° 11 °
On the other hand, in the case of the vertical direction, about 24 ° 37 °
Has divergence. Semiconductor lasers have large individual differences.
In addition, the above divergence angle is also increased by individual semiconductor lasers.
It will be different. Here, the beam shape of the emitted laser light
Depends on the diameter of the aperture 93 and the like.
3 is used to shape the beam diameter. FIG.
Using the laser light emitted after being shaped by the
Figure shows the relationship between the distance from the aperture and the beam diameter when
FIG. Optimal beam diameter for barcode reading
Assuming 550 μm, the barcode readable area is
For example, the range shown in FIG. 45B is obtained. Beam system is too large
If the bar becomes too tight, especially the bars between the bars are narrow
I can't recognize narrow barcodes
That is, the barcode reading efficiency is reduced. That
Therefore, the beam diameter in the reading area should be as narrow as possible.
desirable. Here, the laser beam emitted from the semiconductor laser 91 is
Due to the difference in the divergence angle between the vertical and horizontal directions
The problem will be described with reference to FIG. As shown in FIG.
For example, in the lateral direction where the beam divergence angle is small,
Even if the optimal beam diameter is obtained,
In addition, since the divergence angle is large,
Diameter becomes larger. The diameter of the aperture 93 is subjected to beam shaping.
It has the same vertical and horizontal diameter for the purpose. That
In particular, in the vertical direction,
The light was kicked and the efficiency of using laser light was reduced.
There was a problem of getting around. When usage efficiency is the worst
Can only achieve 18% utilization efficiency at best
Was. To simply increase light use efficiency, aperture 9
3 and increase the f-number of the collimator lens 92
(Shorter focal length) or semiconductor laser
Countermeasures such as talking about the distance between the
You. By increasing the diameter of the aperture 93,
Light is less kicked, improving light use efficiency
be able to. However, the diameter of the aperture 93 must be large.
As a result, it was difficult to narrow down the beam system.
As shown in FIG.
45b is narrower than that of FIG.
The position where the beam system can be narrowed is farther than the position shown in FIG.
Will be. And in the horizontal direction, the aperture
The beam is almost intact as the diameter increases
After passing through aperture 93, beam shaping is substantially completed
I can not do it. Also, the collimator lens f
When the value was reduced, a lens having a large f-number was used.
The beam diameter can be narrowed most in front of the case. in this case
Has a large divergence angle of the beam as shown in FIG.
Ideal for vertical direction, both beam shape and light use efficiency
And the light use efficiency is
There is no problem. However, for lateral directions where the divergence angle is small
Beam is almost not kicked by aperture 93
Beam shaping is not possible,
Problem arises. Therefore, in the horizontal direction,
Image is formed in the space before the reading space,
Because the imaging position differs between the horizontal and horizontal directions, the reading range
The surrounding area also becomes narrow (FIG. 48). Semiconductor laser 91 and collimation
When the distance from the lens 92 is increased,
The same problem as in the case where the f-number of the
appear. Thus, to read barcodes
Increases the efficiency of using laser light and
As wide as possible
Had to be done. Laser module according to the present embodiment
Can solve the above problem, and
While ensuring a beam diameter that can achieve the required resolution for
Laser module that can expand the light intensity margin
Has been realized. With the laser module according to the present embodiment
Is to make the beam diameter in the vertical and horizontal directions the same.
As well as reducing the amount of kicks by the aperture,
The range in which the optimum beam diameter can be secured has been expanded. FIG.
Is when a collimator lens with a relatively large f-number is used.
Figure describing the problem and the solution.
You. In the case of the laser module shown in FIG.
For the transverse direction where the divergence angle is small, for the beam shape
There is no problem and the aperture 93
The light use efficiency based on this can be made ideal.
You. However, when the beam divergence angle is large,
Has no problem with the beam shape,
The amount of light kicked by the camera increases, and the light use efficiency decreases.
U. To solve this problem, the vertical beam diameter
Is reduced without reducing the amount of light,
It is sufficient if the diameter can be made substantially the same as the diameter of the beam. FIG.
[FIG. 4] is a principle explanatory view of the above solution. In FIG.
Shows a right-angle prism 94. This right angle pre
When laser light is incident at a predetermined angle to the
The laser light is refracted by the angular prism 94. here
The ratio of the vertical and horizontal beam diameters is
Equal to the ratio. When using a specific value in the divergence angle range described above,
In this case, the ratio of the divergence angle in the vertical direction and the horizontal direction, that is, the ratio of the beam diameter is
A value of 2.7: 1 is derived. So here
It is necessary to reduce the vertical beam diameter by a ratio of 2.7: 1
is there. When the beam is refracted by the right angle prism 94,
The light exits from the right-angle prism 94 according to the refraction angle.
The beam diameter is converted. Here, the aforementioned 2.7: 1 ratio
An example of achieving beam diameter reduction is illustrated in FIG.
You. The wavelength of the laser light of the semiconductor laser is, for example, 670 n
m have been used away. Also, the right-angle prism 94
The refractive index of the constituting glass is n = 1.5134
And the angle θ of the right-angle prism was set to 37.828 °.
In this case, the laser beam is incident on the surface a of the right-angle prism 94 at a right angle.
When the laser beam is turned on, the laser beam
Emits at an angle of 68.15 ° to the line. Where the figure
The indicated plane direction corresponds to the longitudinal direction of the laser light. this
At this time, the light enters the right-angle prism 94 from the collimator lens 92.
The diameter of the emitted beam and the
As shown in FIG. 51b, the ratio between the diameter of the light and 2.
7: 1. Note that the horizontal direction is
Since the angular prism 94 has no function, the beam diameter is converted.
The diameter of the beam emitted from the semiconductor laser 91 is not maintained.
Be held. FIG. 52 shows a semiconductor laser 91 and a collimator laser.
Arrangement example of the lens 92, the aperture 93, and the right-angle prism 94
It is an illustrated drawing. In this way, using a right angle prism
By reducing the vertical beam diameter, the horizontal beam diameter
By (or almost the same as)
Reduces the amount of light kicked by the tea and improves light use efficiency
Can be done. FIG. 53 shows a collimator having a small f-number.
Solves the problem when using lens (f = 3.6mm)
The target laser module is
This is shown in FIG. In the case of FIG.
There is no problem in the direction,
The problem that the beam shaping cannot be performed because the locker 94 hardly acts.
was there. Therefore, in the case of FIG.
Is expanding. Increase the beam diameter to 1: 2.7
In this case, the right-angle prism 94 used is the same as in FIG.
Is fine. The difference from FIG. 51 is the arrangement of the right-angle prism 94.
In the way. In the case of FIG.
Laser light was incident on the hypotenuse at 68.15 ° with respect to the vertical.
I'm making it. Here, the illustrated plane direction is the horizontal direction of the laser light.
Yes, it is. As a result, the beam diameter in the horizontal direction is set to 2.
It can be enlarged 7 times. FIG. 54 is a right angle view of FIG.
Prism 94, semiconductor laser 91, collimator lens 9
2 is a drawing showing a state in which an aperture 93 is arranged. Figure
As shown in FIG.
With this, it is possible to enlarge the beam diameter in the horizontal direction
And the beam diameter incident on the aperture 93 is set
The size can be the same in both directions. Here,
Angle tolerance of angular prism and position with laser module
Depending on the relationship, the light exits the right-angle prism and
The diameter of the laser beam reaching
Various problems, such as the possibility of
Occurs. FIG. 55a is a diagram illustrating this problem.
is there. For example, the incident light incident on the right-angle prism 94 is parallel.
If it is not light, the laser beam focuses at halfway
The distance relationship between the conductor laser 91 and the collimator lens 92
The focal position, which should be f1, is f2
There is a possibility that it will be. Such a problem is illustrated in FIG.
As shown in FIG. 5b, the beam is changed by the right-angle prism.
The collimator lens 92 with its optical axis
It can be solved by making it rotatable around the heart. Immediately
According to the inclination of the collimator lens 92, the right angle prism
The beam diameter reaching the system can be reduced. That
Therefore, especially the right-angle prism is bonded and fixed to the laser module.
And the right-angle prism 94 can be adjusted.
This is especially effective when there is no such thing. Collimator lens 9
Laser that reaches the right-angle prism 94 by adjusting the angle of 2
By reducing the light beam diameter, the aperture 93
The beam diameter expansion of the arriving laser beam can be offset
You. Note that the description so far has been made using a right-angle prism.
However, this uses a right-angle prism to minimize the apex angle.
The entire laser module can be made smaller.
This is because Especially laser modules
If it is not necessary to reduce the size of the
Even if you use a prism that is not a right angle,
There is no support. In the case of the figure, the angle between the angle a and the angle b is
Different prisms are shown. FIG.
FIG. 4 is a diagram showing an example of beam diameter conversion using means other than
You. In the case of FIG. 57, the cylindrical lens 95a,
95b is used. A field using a cylindrical lens
In this case, only one of the orthogonal axes
Beam diameter of the laser beam in the vertical direction (horizontal direction)
It can be applied to reduction (enlargement). FIG.
In the drawing explaining the means to reduce the beam diameter in the direction
is there. In FIG. 57a, a cylindrical convex lens 95a and
This is combined with a cylindrical concave lens 95b.
The order of lens arrangement is
A remeter lens 92, a cylindrical convex lens 95a,
The order is the cylindrical concave lens 95b. Collimator
The laser light focused by the lens 92 is cylindrical.
Only the vertical direction is further narrowed down by the convex lens 95a. side
Direction can be narrowed only by collimator lens 92
In the vertical direction, the collimator lens 9 and the cylindrical
Since the lens is narrowed by the convex lens 95a,
Lateral beam not affected by cul-convex lens 95a
Laser light in the vertical direction forms an image
I will. In this state, the beam incident on the aperture 93
Diameter is smaller than the beam in the horizontal direction, and exits to the reading space
A problem that the shape of the beam
You. As a means for correcting this beam shape, a cylindrical
A cylindrical concave lens 95b is provided after the convex lens 95a.
Is provided. By the cylindrical concave lens 95b
And the bee squeezed by the cylindrical convex lens 95a
The degree to which the system is narrowed down. In FIG. 57a, the horizontal direction
Are shown by dotted lines. Shown in FIG. 57a
As described above, the cylindrical convex lens 95a and the concave lens 95
Beam diameter incident on the aperture 93 by the action of b
Can be made almost the same shape both horizontally and vertically.
Wear. On the other hand, FIG. 57b shows a method for enlarging the beam diameter in the vertical direction.
It is the drawing explaining the step. In the case of FIG. 57b,
The laser light emitted from the semiconductor laser 91 is collimated.
Lens 92, cylindrical concave lens 95b, cylindrical
The light passes through the cul-convex lens 95a in order, and enters the aperture 93.
Shoot. In FIG. 57b, the solid line is the horizontal beam and the dotted line is
Each shows a vertical beam. Collimatorren
The horizontal beam narrowed by the lens 92 is a cylindrical concave
The image is enlarged at a predetermined magnification by the lens 95b. Meanwhile, vertical
The beam in the direction exerts the action of the cylindrical concave lens 95b.
The beam in the horizontal direction.
You. Here, the lateral beam is a cylindrical concave lens
95b, while the vertical beam is
In order not to be affected by the cylindrical concave gate diagram 95b,
The lateral beam will image farther away.
You. Therefore, the beam in the horizontal direction was emitted to the reading space.
In this case, the beam shape may be lost. This pair
As a measure, in the case of FIG.
A cylindrical convex lens 95a is inserted after the lens 95b.
The beam is being corrected. Cylindrical convex lens
95a, the degree of spread of the beam in the horizontal direction is reduced.
By holding down or focusing, the beam
The degree of convergence should be the same in both the horizontal and vertical directions
Can be. Incidentally, in the case of FIGS.
A cylindrical lens is used, as shown in FIG.
As shown, two cylindrical lenses were stuck together
It is also possible to use such a cylindrical double-sided lens 95c.
It is possible. However, in this case, the distance between the two lens surfaces
Beam conversion takes place in the same medium
To use two cylindrical lenses
It is necessary to mold a lens surface with a smaller radius of curvature than
It is necessary. FIG. 58 shows the light emitted from the laser module 21.
Split the laser beam, and apply different scanning lines A and B respectively.
Fig. 3 is a diagram for explaining a means for generating. Les
The laser light emitted from the user module 21 is
The beam is split by the splitting means 22 into two beams. Two
Is a small beam provided at the center of the concave mirror 30.
Toward the polygon mirror 25 by the reflection mirror 30 '
Is reflected. The light reflected by the polygon mirror 25
The laser light is reflected by the scanning line split mirror 26 and read.
Emitted from the window, one is scanning line A, the other is scanning line B
Becomes The reflected light from the bar code is
5 impinges on the concave mirror 30. Corresponding to scan line A
The reflected light is incident on the photodetector A by the concave mirror 30 and travels.
The reflected light corresponding to the scanning line B is detected by the concave mirror 30 using a light detector.
B is incident. FIG. 59 illustrates an example of the light dividing means.
It is. In FIG. 59a, the laser module 21 exits.
The emitted laser light is combined with the beam A by the half mirror.
Beam B is split. In the case of FIG.
The laser light emitted from the module is half-cup
Alternatively, the beam is divided into beam A and beam B by PBS.
It is. FIG. 60 shows the prism, the dividing means, and the collimator.
VLD module according to the present embodiment incorporating a data lens, etc.
FIG. In the figure, reference numeral 101 denotes a semiconductor laser.
102 is a collimator lens. Kolime
The data lens 102 is a block 103 made of, for example, aluminum.
Is housed inside. Block 103 is shown in the horizontal direction
Position of the laser beam and adjust the focal position of the laser beam.
Adjustment is performed by this. Block 103 has elasticity
It is urged from above by the urging plate 104.
Therefore, the position of the block 103 is fixed. 105
Denotes a right-angle prism, which emits the semiconductor laser 101.
The laser beam is projected from the oblique side of the right-angle prism 105 into a right-angle prism.
Incident on the computer 105. Refracted by right angle prism 105
The laser beam is shaped by the aperture 106.
The beam A and the beam are
B. Beam A, as shown in FIG.
Polygon mirror through through hole 31 of concave mirror 30
25. On the other hand, the beam B is
Irradiated toward. FIG. 61 shows a collimator lens 102.
FIG. 4 is a two-side view of the block 103 in which is stored. FIG. 61a
Is a top view, and FIG. 61b is a front view of the collimator lens 102.
The front view of the state seen from FIG. Collimatore
Lens 102 is inclined at a predetermined angle with respect to the optical axis of the laser light.
It is attached to the block 103. For semiconductor lasers
Is the difference between the vertical and horizontal divergence angles,
have. This depends on the position of the horizontal beam and the vertical position.
Of the output position of the beam,
The focus position of the laser beam may shift
You. The collimator lens 102 according to the present embodiment
Solving the disparity or the problem shown in FIG.
To the optical axis at a predetermined angle in advance.
Have been killed. This mounting angle depends on various conditions.
May be determined in advance. Semiconductor lasers have individual differences
There is a mounting angle of this collimator lens 102
Is an average semiconductor where individual differences do not matter much
Some degree of effect if set as an angle that can respond to laser
Can be achieved.

As described above, according to the present invention, the connector position can be easily determined at the time of connecting the cable. In addition, when the barcode reader is embedded in the counter, the cable does not become an obstacle, and no load is applied to the cable itself. Furthermore, it is possible to grasp at a glance which cable should be inserted into which connector. As described above, according to the present invention, improvement in workability when installing the barcode reader can be expected.

[Brief description of the drawings]

FIG. 1 is a perspective view of a barcode reader according to an embodiment of the present invention.

FIG. 2 is a view illustrating a state in which a barcode is installed on a checkout counter according to an embodiment;

FIG. 3 is a side cross-sectional view of a barcode according to one embodiment.

FIG. 4 is a barcode reading range of the barcode reader according to the embodiment;

FIG. 5 shows the outer dimensions of a barcode reader according to one embodiment.

FIG. 6 is an optical system diagram of a barcode reader according to one embodiment.

FIG. 7 shows a state in which the cover of the barcode is removed according to the embodiment.

8 is a top view and a side view of the bar code reader of FIG.

FIG. 9 is a perspective view of a lower frame.

FIG. 10 is a top view of a lower frame.

FIG. 11 is a side view of the lower frame.

FIG. 12 is a perspective view showing a state where an upper frame and a lower frame are removed.

FIG. 13 is a four-sided view of a mirror frame.

FIG. 14 shows a mirror mounted on a mirror frame.

FIG. 15 is a side cross-sectional view showing an optical system arrangement of a barcode according to one embodiment.

FIG. 16 is a diagram showing a scanning light path of the bottom scanner unit.

FIG. 17 is a diagram illustrating a path of scanning light of a side scanner unit.

FIG. 18 is a scanning pattern emitted from a bottom window.

FIG. 19 is a drawing in which one scanning light is extracted from each of the scanning patterns emitted from the bottom window.

FIG. 20 is a scanning pattern emitted from a side window.

FIG. 21 is a view showing emission of a scanning pattern.

FIG. 22 is a side cross-sectional view of the apparatus showing a ray path until a ray emitted from a light source is reflected by a polygon mirror.

FIG. 23 is a perspective view of the apparatus showing a ray path until a ray emitted from a light source is reflected by a polygon mirror.

FIG. 24 is a side sectional view of the apparatus showing a path of scanning light emitted from the bottom scanner unit.

FIG. 25 is a side sectional view of the apparatus showing a path of scanning light emitted from the side scanner unit.

FIG. 26 is a diagram illustrating a comparison between a scanning pattern emitted from a bottom window of a barcode reader according to an embodiment and a conventional barcode reader.

FIG. 27 is a diagram illustrating a comparison between a barcode reader according to an embodiment and a scanning / reading range of a conventional barcode reader.

FIG. 28 is a side cross-sectional view of the apparatus showing a path of reflected light from a bar code.

FIG. 29 is a view showing a light source arrangement and respective optical paths.

FIG. 30 is a view showing a light source arrangement and respective optical paths.

FIG. 31 is a diagram showing a conventional light receiving means arrangement, a reading range, and a device depth.

FIG. 32 is a diagram showing the arrangement of light receiving means and the reading range and apparatus depth of the embodiment.

FIG. 33 is a two-sided view of a concave mirror;

FIG. 34: Arrangement of adjusting screws for concave mirror angle

FIG. 35 is a view showing attachment of a concave mirror to a frame and angle adjustment.

FIG. 36 is a two-sided view of a bottom mirror.

FIG. 37 shows the arrangement of the angle adjusting screws of the bottom mirror;

FIG. 38 is a projection provided on the bottom window surface.

FIG. 39 shows an example of a printed circuit board.

FIG. 40: Printed circuit board layout of a conventional bar code reader

FIG. 41 is an illustration of a printed circuit board arrangement of a bar code reader according to an embodiment.

FIG. 42: Rear view of bar code reader and various connector arrangement examples

FIG. 43: Back side of bar code reader with printed circuit board attached

FIG. 44: Back side of bar code reader before printed circuit board is attached

FIG. 45 shows a laser module and a barcode reading area.

FIG. 46: Difference in beam diameter of semiconductor laser

FIG. 47 Beam jolting by aperture

FIG. 48: Change in barcode reading area when taking measures to prevent eclipse

FIG. 49: Problems when a collimator lens having a small f-number is used

FIG. 50: Problems when a collimator lens having a large f-number is used

FIG. 51: Beam diameter conversion using a right-angle prism

FIG. 52 shows a laser module using a right-angle prism.

FIG. 53: Beam diameter conversion using a right-angle prism

FIG. 54 shows a laser module using a right-angle prism.

FIG. 55: Reading area change when a collimator lens is rotated

FIG. 56 shows an example of a prism other than a right-angle prism

FIG. 57: Beam diameter conversion using a cylindrical lens

FIG. 58 is an example of a barcode reader that divides a laser beam and generates two scanning beams.

FIG. 59 shows an example of beam splitting means.

FIG. 60 shows a VLD module according to one embodiment.

FIG. 61 is a block for housing a collimator lens;

FIG. 62 shows a conventional barcode reader.

FIG. 63 shows a conventional bar code reader having a two-sided reading window (1).

FIG. 64 shows a conventional bar code reader having a two-sided reading window (2).

FIG. 65 is a top view of a settlement counter.

FIG. 66: Bar code reading area of a two-sided bar code reader

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Bar code reader 2 ... Side scanner part 3 ... Bottom scanner part 4 ... Side window 5 ... Bottom window 85 ... Main printed circuit board 86 ... Connector 87. Power cable connection Connector 88 ・ ・ ・ Interface connector

Continuation of the front page (72) Inventor Hiroshi Watanuki 4-1-1 Kamikadanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Inside Fujitsu Limited (72) Inventor Yukizo Yamazaki 4-1-1 Kamikodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture No. Fujitsu Limited

Claims (2)

[Claims] 1. A bar code reader having a reading window for emitting scanning light at least upward, and embedded and used on a counter surface on which an article to be read is placed,
A printed circuit board on which a plurality of connectors, such as a control unit, a connector for supplying power to the device, and a connector for inputting or outputting signals, are arranged in the horizontal direction on the bottom of the device, and is embedded below the counter surface. At the bottom, a notch for forming a space is provided. A bar code reader, characterized in that: 2. The bar code reader according to claim 1, wherein a name of the connector is displayed near each connector.