JP2000057248A - Code reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent read error as much as possible by preventing the code reader from slanting to the scanning direction of a manual scan on a code pattern, and further to easily position the code reader at the code pattern and to prevent the code pattern from soiling. SOLUTION: The tip part 22 of the code reader which is moved manually in contact with the code pattern is provided with two projection pieces 22B for tilt prevention, projecting in the scanning direction, on each side of the external surface in the scanning direction. On the side of the tip part 22 which comes into contact with a recording medium, a groove part 22C which is almost as wide as the vertical width of the code pattern is provided along the scanning direction where an opening 22A for taking in an image of the code pattern is present.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet-like recording medium, such as paper, on which audio, video, and various data used in a computer or the like are printed and recorded as an optically readable code pattern. The present invention relates to an improvement in a code reader configured to manually scan a code pattern and optically read the code pattern.

[0002]

2. Description of the Related Art Conventionally, a code pattern is manually scanned and optically read from a sheet-like recording medium such as paper on which data is printed and recorded as an optically readable code pattern. As a pen-type code reader, for example, as disclosed in Japanese Patent Application Laid-Open No. Hei 6-231466, an area sensor such as a CCD that converts an image formed by an optical system such as a lens into an electric signal and outputs the electric signal is provided. In order to optically read a code pattern printed and recorded optically readable on a recording medium, the code pattern is manually scanned while the leading end face having the imaging opening is in contact with the sheet-shaped recording medium. 2. Description of the Related Art A pen-type code reader configured to optically read data is known.

FIG. 9 is a diagram showing a physical format configuration of a dot code 1, which is an example of the code pattern. That is, a plurality of rectangular blocks 2 are two-dimensionally arranged adjacent to each other to form a dot code 1. Each of the blocks 2 is, for example, data obtained by dividing each block of data relating to audio with its value. A data dot pattern portion 3 that exists in a predetermined arrangement as a dot image of white dots or black dots corresponding to a certain “0” or “1”;
A marker 4 having a constant number of continuous blacks arranged at four corners of each block 2 used for finding a reference point for detecting each dot of the data dot pattern portion 3
And a block address pattern section 5 including an error detection or error correction code disposed between the markers 4 so that the plurality of different blocks 2 can be identified at the time of reading.

[0004] FIG. 10A is a diagram showing an electrical functional block configuration of a code reader for optically reading the dot code 1. In other words, this code reader uses L for illuminating the dot code 1 described above.
An imaging unit 6 including an illumination unit composed of an ED or the like, an optical system for imaging the reflected light of the dot code 1, and an area sensor such as a CCD for imaging the imaging light from the optical system; A binarization processing unit 7 for performing binarization processing on the output imaging signal with a predetermined binarization threshold value;
A binarized image memory 8 for storing binarized binarized image data, and reading out the binarized image data stored in the binarized image memory 8 to detect the dots; Assign a value of “0” or “1” for each dot,
A restoring unit 9 for outputting the data, a demodulating unit 10 for demodulating the data output by the restoring unit 9, and a reproducing unit for reproducing data relating to the original audio by performing error correction processing, data expansion processing and the like 11 at least.

[0005] In this code reader, even if the entire size of the dot code 1 is larger than the imaging field of view 6A of the imaging unit 6, as shown in FIG. By moving in the direction indicated by the arrow in the figure and sequentially capturing images while dividing the area, the reading can be performed.

In other words, even if the dot code 1 cannot be imaged in one shot, as long as each address given to the block 2 can be read and recognized, the data of each block 2 can be reconstructed by the address. Data can be reconstructed.
Information that could not be realized with a two-dimensional or two-dimensional bar code can be stored in a large amount and at a high density on paper or the like, and transmission of voice and the like using paper as a medium can be easily performed. Expectations are expanding for applications.

Here, when the restoration section 9 reads out the binarized image data stored in the binarized image memory 8 and detects each dot, first, the marker 4 is read from the binarized image data. Then, a dot reading reference position is obtained based on the barycentric position of the marker 4 thus found, and each dot in the data dot pattern section 3 is determined from the obtained dot reading reference position. A dot center pixel is detected for reading, and it is determined whether each of the detected dots is white or black, and "0" or "1"
And outputs data.

Therefore, even if there is some problem in the print quality of the dot code printed and recorded at high density, for example, even if there is some geometric distortion, the reading operation is performed adaptively. Read stability is almost guaranteed.

Since the demodulation unit 10 has previously performed modulation processing on the audio data input as a recording target when the dot code 1 is formed, the demodulation unit 10 performs processing for returning the data to the original data before modulation. This is the part to do.

That is, the modulation processing is performed by the restoration unit 10 described above.
First, in the process which has been performed in advance to make it easier to find the marker 4, the data dot pattern portion is used to distinguish each dot in the data dot pattern portion 3 from the marker 4 in an image. 3 is applied to the data relating to the input voice so that the number of continuous black dots in 3 becomes smaller than the number of continuous black dots forming the marker 4 as a result.

For example, when the maximum diameter of the marker 4 is equivalent to a size formed by arranging five black dots printed and recorded in the data dot pattern portion 3 in a predetermined direction adjacent to each other, after the modulation process, The modulation processing is applied to the data relating to the input voice so that the number of continuous black dots in the modulated data of the above is less than the five.

[0012]

However, the pen-type code reader disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 6-231466 is excellent in portability and good in handling at the time of scanning a code pattern. Therefore, as shown in FIG. 10B, when reading the code pattern, the code reader main body 12 is easily inclined in the scanning direction, which is the longitudinal direction of the code pattern 13, so that the code having the imaging aperture can be easily read. The contact surface at the tip of the reader body is lifted so that the code pattern 13
Is out of focus, and the code pattern 13 cannot be accurately imaged. As a result, a reading error is caused.

On the other hand, for this type of pen-type code reader, it is necessary to consider in advance that the alignment of the tip of the code reader main body with the code pattern can be easily performed. There is another basic demand that it is necessary to take into account as much as possible the contamination of the code pattern due to the contact of the tip.

The present invention has been made in view of the above circumstances, and has solved these disadvantages. In manual scanning of a code pattern, the code reader is prevented from being inclined with respect to the scanning direction, thereby minimizing a reading error. It is still another object of the present invention to provide a code reader in which the alignment of the code reader with respect to the code pattern can be easily performed, and the code pattern can be prevented from being stained as much as possible.

[0015]

In order to achieve the above object, a code reader according to the first aspect of the present invention converts an optical system and an image formed by the optical system into an electric signal and outputs the electric signal. An area sensor is provided, in which the sheet-shaped recording medium has an imaging opening in order to optically read the code pattern from a sheet-shaped recording medium on which data is printed and recorded as an optically readable code pattern. A code reader configured to move by a predetermined distance and manually scan and read the code pattern while making contact with the distal end surface, wherein the distal end surface facing the code pattern of the code reader body tip portion, A first groove having both ends opened in the scanning direction is provided, and the first groove is formed by two portions of the code reader main body front end facing each other in the scanning direction. A second groove provided along the outer surface in the longitudinal direction of the code reader body, characterized in that it is a continuous groove.

In other words, according to the code reader of the first aspect of the present invention, the two outer faces of the code reader main body front end facing the code pattern in the scanning direction of the code reader main body front end are provided on the front end face facing the code pattern. A first groove is formed on the side surface and is continuous with the second groove provided along the longitudinal direction of the code reader body.

Therefore, the portions on both sides of the second groove portion have a protruding shape when viewed from the first groove portion side, and function as a kind of ridge for preventing inclination, so that the code reader scans the recording medium during scanning of the code reader. Scanning can be easily performed without tilting. Furthermore, since the code pattern can be seen by the side grooves when scanning the code reader, it is clear where to place the code reader with respect to the code pattern to be read, and errors due to improper reading by the user can be eliminated.

According to a second aspect of the present invention, there is provided a code reader including an optical system, and an area sensor for converting an image formed by the optical system into an electric signal and outputting the electric signal, so that data can be optically read. In order to optically read the code pattern from a sheet-shaped recording medium that has been printed and recorded as a code pattern, the sheet-shaped recording medium is moved by a predetermined distance while being brought into contact with the leading end surface having the imaging opening. A code reader configured to manually scan and read a code pattern, wherein each of two outer surfaces of the code reader main body, which are opposed to each other in the scanning direction, are substantially parallel to each other and protrude along the scanning direction. Are formed, and the distance between the two inclination preventing ridges is defined as the width of the code pattern in a direction orthogonal to the scanning direction. At the same time, a groove having a width substantially equal to the width of the code pattern is provided on the front end surface of the code reader body opposite to the code pattern, which is open at both ends on the two outer surfaces. It is characterized by.

That is, according to the code reader of the second aspect of the present invention, the width of the code pattern in the direction orthogonal to the scanning direction is provided on each of two outer surfaces of the code reader main body that face each other in the scanning direction. Two substantially parallel inclination preventing ridges, which are spaced apart at substantially equal distances, are formed so as to protrude along the scanning direction, and are provided on the front end face of the code reader body tip portion opposing the code pattern. A groove having a width substantially equal to the width of the code pattern is provided on the outer side surface, both ends of which are open.

[0020] Therefore, the projection for preventing inclination can easily scan the code reader without tilting with respect to the recording medium when scanning the code reader, and further, since the code pattern can be seen by the side grooves when scanning the code reader. ,
It becomes clear where the code reader should be placed for the code pattern to be read, and errors due to improper reading by the user can be eliminated. Further, by providing a groove substantially equal to the vertical width of the code pattern along the scanning direction on the opening side, the contact surface of the code reader does not rub the code pattern during scanning, and does not damage the code pattern.

According to a third aspect of the present invention, there is provided a code reader including an optical system, and an area sensor for converting an image formed by the optical system into an electric signal and outputting the electric signal, so that data can be optically read. In order to optically read the code pattern from a sheet-shaped recording medium that has been printed and recorded as a code pattern, the sheet-shaped recording medium is moved by a predetermined distance while being brought into contact with the leading end surface having the imaging opening. A code reader configured to manually scan and read a code pattern, wherein two outer surfaces of the code reader body front end facing the scanning direction are opened in a substantially U-shape at the distal end surface. The groove is formed.

That is, according to the code reader of the third aspect of the present invention, the two outer surfaces of the leading end of the code reader main body facing in the scanning direction are formed with a substantially U-shaped groove at the tip end surface. are doing.

Therefore, since the code pattern can be seen by the side grooves when scanning the code reader, it is clear where to place the code reader with respect to the code pattern to be read, and errors due to improper reading by the user can be eliminated. .

According to a fourth aspect of the present invention, there is provided a code reader comprising an optical system and an area sensor for converting an image formed by the optical system into an electric signal and outputting the electric signal, and the data is optically readable. In order to optically read the code pattern from a sheet-shaped recording medium that has been printed and recorded as a code pattern, the sheet-shaped recording medium is moved by a predetermined distance while being brought into contact with the leading end surface having the imaging opening. A code reader configured to manually scan and read a code pattern, wherein each of two outer surfaces of the code reader main body, which are opposed to each other in the scanning direction, are substantially parallel to each other and protrude along the scanning direction. Are formed, and the distance between the two inclination preventing ridges is defined as the width of the code pattern in a direction orthogonal to the scanning direction. Characterized by being substantially equal configuration.

That is, according to the code reader of the present invention, the two parallel outer surfaces of the code reader main body protruding along the scanning direction are respectively provided on the two outer surfaces facing each other in the scanning direction. The two inclination preventing ridges are formed at a distance substantially equal to the width of the code pattern in a direction orthogonal to the scanning direction.

Therefore, the inclination preventing protrusions facilitate the scanning of the code reader without inclining the recording medium when scanning the code reader. Also,
It becomes clear where to place the code reader with respect to the code pattern to be read, and errors due to improper reading by the user can be eliminated.

According to a fifth aspect of the present invention, there is provided a code reader for optically reading a code pattern from a sheet-shaped recording medium on which data is printed and recorded as an optically readable code pattern. A code reader that is configured to manually scan and optically read the code pattern while contacting the sheet-shaped recording medium when optically reading the code pattern; A satin finish is applied to at least a contact surface that contacts the sheet-shaped recording medium.

That is, according to the code reader of the fifth aspect of the present invention, the contact surface that comes into contact with the sheet-shaped recording medium is subjected to satin finish. Therefore, even when a transparent resin sheet is placed on the code pattern in order to protect the code pattern, the code pattern can be smoothly slid when scanning with the code reader, and the scanning is not impaired.

[0029]

Embodiments of the present invention will be described below with reference to the drawings. [First Embodiment] FIGS. 1A and 1B are a side view and a front view showing an external shape of a pen-type code reader as a first embodiment of a code reader according to the present invention. FIGS. 2A and 2B are a cross-sectional view of the pen-type code reader of FIG. 1A and a cross-sectional view taken along line BB in FIG. 2A.

The pen-type code reader includes an imaging section 6, a binarization processing section 7, a binarized image memory 8, a restoration section 9, and a demodulation section 10 as described above with reference to FIG. , And the reproducing unit 11 are provided in a pen-shaped casing.

Here, the imaging unit 6 includes a light source 14 composed of an LED or the like, a substrate 15 on which the light source 14 is mounted, a light reflection member 16 composed of a bright aluminum plate or the like, and a light diffusion member 17 composed of a white sheet member or the like. Illuminating section for illuminating a code pattern composed of
And an imaging optical unit for imaging reflected light from the code pattern on the imaging device 20 and an imaging device such as a CCD for converting the light imaged by the imaging optical unit into an electric signal. 20. Then, the other processing circuit units, that is, the binarization processing unit 7 to the reproduction unit 11
It is mounted on the main board 21 and processes the image captured by the image sensor 20 to output information such as sound.

The exterior housing which internally holds the binarization processing section to the reproduction section 11 mounted on the imaging section 6 and the main board 21 has a tip to be brought into close contact with the recording medium on which the code pattern is printed when scanning the code pattern. It comprises a part 22, an upper cover 23, a lower cover 24, and a battery chamber cover 25.

In addition, in FIG. 2A, a connection cable 26 for connecting the image pickup device 20 and the processing circuit unit mounted on the main board 21 and a battery 2 serving as a driving power source are shown.
7, a minus terminal 28 and a plus terminal 29 serving as battery terminals thereof, and an operation switch 30 for instructing the user to start reading are shown.

The shield plate 31 is formed of a conductive member such as a metal plate, forms a part of a wall on the battery minus side of the battery housing, and has a minus terminal 28 and a main board 21.
Is electrically connected to the ground. This is to prevent the emission of radio waves that adversely affect other electronic devices and the like.

In the lighting section, the light reflecting member 16
Is for reflecting the light emitted from the light source 14 and condensing it on the code pattern, and the light diffusing member 17 is for diffusing the light emitted from the light source 14 to make uniform illumination on the code pattern. Things.

Here, as an example, as shown in FIG. 2B, the imaging optical unit is positioned by inserting a hole of the lens frame 19 into a positioning unit 32 provided on the lower cover 24, and The upper cover 23 and the lower cover 24 are fastened and held by the screws 33 in a state of being sandwiched between the upper cover 23 and the lower cover 24. As a result, the simplification of the configuration and the opening 22
A displacement of the optical axis of the imaging optical system with respect to A is less likely to occur.

FIG. 3 is a diagram showing a scanning state of a code pattern by such a pen-type code reader. As shown in FIG. 3 and FIGS. 1A and 1B, the distal end portion 2 of the code reader which is in contact with the recording medium 34 and is manually scanned.
2, two anti-inclination ridges 22B are provided on one side of the code reader on both sides of the outer surface facing each other in the scanning direction (the direction of the arrow in FIG. 3). With the ridge 22B for preventing inclination,
Even when scanning the code reader, the code reader is less likely to be tilted in the scanning direction, and it is possible to minimize the occurrence of a reading error due to the blurred focus due to the tilted code reader.

Further, since the two ridges 22B for preventing inclination are provided so as to substantially sandwich the vertical width of the code pattern 13 around the opening 22A, two ridges 22B are provided on one side. If the positioning and scanning are performed so that the code pattern 13 is sandwiched between the protruding strips 22B, the code pattern 13 always passes through the opening 22A,
Since the fact that the code pattern 13 could not be taken is eliminated, it is possible to prevent the occurrence of a reading error from this point as well.

The scanning position of the user can be made clearer by making the inclination preventing ridge 22B substantially equal to the vertical width of the code pattern. Further, if the width is widened enough to indicate the scanning position, the width of the scanning by the user is increased, and the scanning can be performed easily. Here, in the present code reader, in order to allow a user to perform a rough scan, the imageable range on the image sensor 20 is set to be larger than the image of the code pattern 13, and thus, a little Allows shake. Therefore, “sufficient to indicate the scanning position” means a state in which a code pattern necessary for the image sensor 20 can be captured.

In addition, as shown in FIG. 1 (B), the code pattern 1
3, a groove portion 22C corresponding to the vertical width is provided along the scanning direction at a position where the image capturing opening 22A of the code pattern 13 exists. Thereby, the recording medium 34
The contact portion is only the contact surface 22D, and scanning can be performed without contacting the code pattern 13, and the possibility of damaging the code pattern 13 during scanning is reduced. That is,
The groove 22C has a width substantially equivalent to the vertical width of the code pattern 13 so as not to damage the code pattern 13. Code pattern vertical width is code pattern 1
3 is a dot code 1 formed by arranging a plurality of rectangular blocks having a predetermined area adjacent to each other and capable of holding divided data obtained by dividing data by a predetermined amount. It depends on whether two are arranged. In the dot code 1 shown in FIG. 9, three blocks 2 are arranged vertically.

The tip portion 22 is different from polycarbonate, polystyrene, ABS, etc. generally used for the material of exterior parts.
By using a material having a small coefficient of friction (for example, polyacetal, nylon, or the like), the code reader can be made to slide smoothly during scanning, and even if it slides on the code pattern 13, the code pattern 13 is not damaged. Can be.

Further, the cap 35 can be attached to the code reader as shown in FIG. This cap 35
The opening 22A can be shielded at the time of attachment to the code reader, and the adhesion of dirt to the lens 18 when the code reader is not used can be prevented. Here, description of holding the cap 35 on the code reader will be omitted.

The cap 35 has a fitting portion 35A for fitting to the projecting ridge that is fitted between the two inclination preventing ridges 22B on the scanning direction side. Accordingly, when the cap 35 is attached to the code reader, the space between the two inclination preventing ridges 22B (the concave portion 22 when viewed from the inclination preventing ridge 22B).
E) can be buried, and the ridge 22B for preventing inclination can be protected. That is, the ridge 22B for preventing inclination is provided.
Cannot be made large (thick) in the production of the ridge piece 22B and in appearance. Therefore, for example, when an impact force or the like is applied to the protruding fin portion 22B, which is the protruding fin portion, from the outside during carrying, the protruding fin portion 22B may be damaged. Therefore, if there is a fitting portion 35A to the ridge provided on the cap 35, it is possible to prevent deformation and breakage due to external force applied to the ridge 22B for preventing inclination. In other words, the ridge 22 for preventing inclination
B can be protected.

[Second Embodiment] Next, a second embodiment of the present invention will be described.
An embodiment will be described. FIG. 1C is a perspective view showing the shape of the tip of a pen-type code reader as a code reader according to a second embodiment of the present invention.

That is, the tip 122 forms a recess 122E as a second groove between the inclination preventing ridges 122B, and furthermore, the first groove 12E continuous with the recess 122E.
2C, code pattern 1
3 are provided such that both ends are opened in the scanning direction.

As described above, in the present invention, various shapes of tips can be adopted without departing from the gist thereof. [Third Embodiment] Next, a third embodiment of the present invention will be described. Note that the following description will be given by taking the pen-type code reader according to the first embodiment as an example, but can also be applied to the pen-type code reader according to the second embodiment.

That is, in order to further improve the durability of the code pattern 13 printed and recorded on the recording medium 34 or to prevent the code pattern 13 from being stained, at least the code pattern 13 on the recording medium 34 is required. The upper part may be adhered with a transparent resin sheet.

For example, in a photo album, it is a transparent resin sheet made of a material such as polyester, nylon, polypropylene or the like, which is covered on the photograph attached to the mount.

At this time, when a code pattern printed on a photograph is read by a code reader through a transparent resin sheet, the contact surface of the code reader is intended to prevent inclination and reduce sliding resistance. The contact surface may adhere to the resin sheet surface because it is formed as a smooth surface.

In this case, the coefficient of friction with respect to the resin sheet surface at the time of scanning the code reader increases, and the load resistance at the time of scanning the code reader increases, leading to a deterioration in operability.

Therefore, in the third embodiment, in particular, at least the contact surface 22 of the code reader which contacts the recording medium.
D is subjected to a satin finish.

That is, as shown in the enlarged view of FIG. 5 showing the state of contact between the recording medium 34 and the contact surface 22D of the code reader,
The contact surface 22D has a surface roughness of 1 at the maximum height (Rmax).
The surface is roughened in the range of 0 to 100 microns. As a result, a process of coating the transparent resin for protecting the code pattern 13 or covering the medium 34 itself with a transparent resin sheet is performed, which results in a smoothing of the surface of the medium 34. This prevents the occurrence of adhesion between the contact surface 22D and the contact surface 22D of the code reader, and prevents operability from being impaired due to an increase in load resistance during scanning of the code reader. The surface roughness (Rmax) of the contact surface 22D and the scanning direction in a state where the code reader when the transparent sheet made of polyester is put on the recording medium 34 on which the code pattern 13 is recorded is pressed against the transparent sheet with a certain amount of force. 6A has a relationship as shown in FIG.

Here, the satin finish is a process for reducing the contact area of the contact surface 22D with the transparent sheet as a result. Therefore, this processing can be realized by a processing method for forming irregularities on a plane, such as a blasting process or a mat finish, in addition to the forming process described later, but it is needless to say that the present invention is not limited to these methods. It is.

The tip 22 is formed on the contact surface 22D so as to straddle the code pattern 13 in the width direction perpendicular to the scanning direction for the code pattern 13. Accordingly, the code pattern 13 is not rubbed during the scanning by the code reader, and the code pattern 13 is not damaged even by performing the scanning many times. Similarly, although not shown, even if the contact surface 22D is not particularly configured to straddle the code pattern 13, the matte finish is applied to the surface while avoiding the code pattern 13 in the width direction perpendicular to the scanning direction with respect to the code pattern 13. It is also effective to make the portion of the code pattern width smooth.
However, at this time, the smooth portion must not protrude beyond the height of the convex portion formed by the satin finish.

Here, the reason why the surface roughness is set to 100 μm is that the scanning pattern of the transparent sheet is not used, and the scanning of the operator meanders, and the contact surface 22D slides on the code pattern. However, this is because care was taken not to damage the code pattern 13 itself. Also,
The concavo-convex pattern 22F provided on the contact surface 22D is formed in an irregular pattern. This is because even if the scanning of the operator is meandering and the code reader may slide on the code pattern, the uneven pattern 22F may be irregularly arranged, so that the convex portion which becomes a substantial contact portion may be provided. This is because there is no possibility of damaging the code pattern 13 because the parts do not concentrate and rub a specific position on the code pattern.

The contact surface 22 having the fine concavo-convex pattern
D is composed of a crystalline resin such as polyacetal, nylon, PBT, or the like. By using such a crystalline resin, the frictional resistance when sliding on the medium surface during scanning is reduced, and scanning is facilitated.

FIG. 7 schematically shows an example of forming the tip 22. In the gap formed by the movable mold 36 and the fixed mold 37, the molten resin 3 melted by the heating cylinder 38
9 is poured to form the tip 22. Molten resin 39
Is passed through the spool section 40 and the runner section 41 to the distal end section 22.
To form Here, the concavo-convex pattern is generated by a blast method or an etching method in a mold for forming the contact surface 22D.
In this example, a concavo-convex pattern is generated on a fixed mold that forms the contact surface 22D. The reason for this is that, for example, if the irregularities are formed by machining after forming the contact surface 22D, as shown in FIG.
This is because the projections of the irregularities may become acute angles due to material peeling or the like, and may damage the medium surface on which the code pattern is recorded. On the other hand, when the mold for forming the contact surface 22D is provided with irregularities, the concave portion on the mold and the convex portion on the contact surface 22D always become the R surface due to the sagging of the processing. Therefore,
The risk that the concavo-convex pattern 22F will damage the code pattern during scanning is significantly reduced.

[Fourth Embodiment] Next, a fourth embodiment of the present invention will be described.
An embodiment will be described. In the third embodiment, the pen-type code reader has been described as an example, but the satin finish processing is not limited to the code reader having such a shape.

For example, this matte finish is similarly applied to a contact surface in a mouse-shaped code reader or the like as shown in FIGS. 8A and 8B disclosed in Japanese Patent Application Laid-Open No. 6-68292. Applicable. Here, reference numeral 2
18 is a lens, 220 is an image sensor, 221 is a main board, 222 is a tip, 222D is a contact surface, 227 is a battery, 230 is an operation switch, 242 is a speaker, 243
Is a wireless transmission device for communication with an external device.

Although not particularly shown, such a mouse-type code reader also has the first
Needless to say, a ridge for preventing inclination as in the embodiment may be provided.

Although the present invention has been described based on the above embodiments, the present invention is not limited to the above embodiments, and various modifications and applications are possible within the scope of the present invention. . Here, the summary of the present invention is as follows.

(1) An optical system, and an area sensor for converting image-forming light from the optical system into an electric signal and outputting the electric signal,
In order to optically read the code pattern from a sheet-shaped recording medium on which data is printed and recorded as an optically readable code pattern, the leading end surface having the imaging opening is brought into contact with the sheet-shaped recording medium. In a code reader configured to move by a predetermined distance and manually scan and read the code pattern, both ends in the scanning direction are opened at the distal end surface of the code reader body facing the code pattern. A second groove provided along a longitudinal direction of the code reader main body on two outer surfaces of the code reader main body front end facing each other in the scanning direction. And a continuous groove.

That is, when scanning the code reader, the code reader can easily scan the recording medium without tilting, and furthermore, it is clear where to place the code reader with respect to the code pattern to be read, and the user is not allowed to scan. Errors due to proper reading can be eliminated.

(2) The width of the first groove and the width of the second groove in the direction orthogonal to the scanning direction are formed to be equal, and the width of the first and second grooves is orthogonal to the scanning direction. The code reader according to the above (1), wherein the width of the code pattern is substantially equal to the width of the code pattern in the direction of the movement.

(3) The width of the first groove and the width of the second groove in a direction orthogonal to the scanning direction are formed to be equal, and the widths of the first and second grooves are orthogonal to the scanning direction. The code reader according to (1), wherein the width of the code pattern is larger than the width of the code pattern in the direction of the movement.

That is, by providing a groove having a width larger than the upper and lower widths of the code pattern along the scanning direction on the opening side, the width of the scanning by the user can be increased, and the scanning can be performed easily. In addition, the contact surface of the code reader does not rub the code pattern during scanning, so that the code pattern is not damaged.

(4) The device according to the above (1), further comprising a cap that can be removably fitted with the second groove portion as a fitting portion for shielding at least the imaging opening. Code reader.

In other words, by providing a cap that has a portion that fits in the groove and closes the opening when the code reader is mounted on the code reader, it is possible to prevent dirt from adhering to the lens when the code reader is not used. Can be prevented from being deformed or damaged due to external force applied to the ridges.

(5) An optical system, and an area sensor for converting the image forming light from the optical system into an electric signal and outputting the electric signal,
In order to optically read the code pattern from a sheet-shaped recording medium on which data is printed and recorded as an optically readable code pattern, the leading end surface having the imaging opening is brought into contact with the sheet-shaped recording medium. In a code reader configured to move by a predetermined distance and manually scan and read the code pattern, the code reader body tip portion has two outer surfaces opposed to each other in the scanning direction, and the two in the scanning direction. Two substantially parallel anti-inclination ridges protruding along each other, and the distance between the two anti-inversion ridges is substantially equal to the width of the code pattern in a direction orthogonal to the scanning direction. In addition, the above-mentioned code pad having both ends opened on the two outer surfaces on the front end face opposing the code pattern on the front end of the code reader body. Code reader, characterized in that a groove portion having a width substantially equal to the width of the over down.

That is, when scanning the code reader, the code reader can easily scan the recording medium without tilting, and furthermore, it is clear where the code reader should be placed with respect to the code pattern to be read, and the user is not allowed to scan. Errors due to proper reading can be eliminated. Also, by providing a groove substantially equal to the vertical width of the code pattern along the scanning direction on the opening side, the contact surface of the code reader does not rub the code pattern during scanning,
Does not damage the code pattern.

(6) The code reader as described in (5) above, wherein the tip portion of the code reader main body, on which the inclination preventing ridge is formed, is formed of a separate member. That is,
The tip portion of the code reader can be made of a material having a different coefficient of friction than the other exterior members, so that the load of the code reader during scanning can be reduced and scanning can be performed easily. Further, even if the code pattern is scanned, damage to the code pattern is minimized.

(7) A cap for shielding at least the imaging opening, which can be removably fitted with a recess formed between the two inclination preventing ridges as a fitting portion, is further provided. The code reader according to (5), wherein:

In other words, by providing a portion that fits between the protruding strips of the code reader and by providing a cap that closes the opening when the code reader is mounted, it is possible to prevent adhesion of dirt to the lens when the code reader is not used. In addition, it is possible to prevent deformation and damage due to external force applied to the protruding strip when the code reader is carried.

(8) The code reader according to (5), wherein at least the cross-sectional profile of the tip portion of the code reader main body is formed in a substantially rectangular shape. That is, by forming a rectangular cross section along the shape of the opening, the layout of the internal members can be efficiently performed, and the size of the apparatus can be reduced. In addition, it becomes easy to perform positioning with respect to the code pattern.

(9) The code pattern is formed by adjacently arranging a plurality of blocks each having a predetermined area capable of holding divided data obtained by dividing data by a predetermined amount. Identify a data dot pattern composed of a plurality of dots arranged corresponding to data, a marker for determining a reading reference position of the data dot pattern arranged in a predetermined positional relationship with respect to the data dot pattern, and identify each block. The code reader according to the above (1) or (5), characterized in that the code reader comprises at least a block address pattern.

That is, according to this code pattern, information such as voice can be printed and recorded on paper or the like, and it is very suitably used for the code reader according to the present invention. (10) An optical system, and an area sensor that converts an image formed by the optical system into an electric signal and outputs the electric signal. The data is recorded on a sheet-shaped recording medium on which data is printed and recorded as an optically readable code pattern. In order to optically read the code pattern, the sheet-shaped recording medium is moved by a predetermined distance while being in contact with the leading end surface having the imaging opening, and is manually scanned and read. A code reader characterized in that a groove opening in a substantially U-shape is formed in the front end surface on two outer surfaces of the code reader main body front end portion facing the scanning direction.

That is, since the code pattern can be seen by the side groove when scanning the code reader, it is clear where to place the code reader with respect to the code pattern to be read, and errors due to improper reading by the user can be eliminated. .

(11) On each of the two outer surfaces of the code reader body tip facing each other in the scanning direction, two substantially parallel anti-inclination ridges projecting along the scanning direction are formed, respectively. (10) wherein the distance between the two inclination preventing protrusions is substantially equal to the width of the code pattern in a direction orthogonal to the scanning direction.
The code reader according to 1.

That is, the scanning of the code reader can be easily performed without tilting the recording medium during the scanning of the code reader, and the contact surface of the code reader does not damage the code pattern during the scanning.

(12) An optical system and an area sensor for converting an image formed by the optical system into an electric signal and outputting the electric signal, and a sheet-shaped data on which data is printed and recorded as an optically readable code pattern. In order to optically read the code pattern from the recording medium, the sheet-shaped recording medium is moved by a predetermined distance while contacting the front end surface having the imaging opening, and the code pattern is manually scanned and read. In the configured code reader, two substantially parallel inclination preventing ridges projecting along the scanning direction are formed on each of two outer surfaces of the code reader main body tip portion facing each other in the scanning direction. Wherein the distance between the two inclination preventing ridges is substantially equal to the width of the code pattern in a direction orthogonal to the scanning direction. leader.

That is, when the code reader scans, the code reader can easily scan without tilting with respect to the recording medium. In addition, it becomes clear where the code reader should be placed with respect to the code pattern to be read, and errors caused by improper reading by the user can be eliminated.

(13) The code pattern, wherein both ends of each of the two outer surfaces facing the scanning direction are opened in a substantially U-shape on the tip end surface facing the code pattern of the code reader body tip. The code reader according to the above (10) or (12), further comprising a groove having a width substantially equal to the width of the code reader.

That is, by providing a groove having a width substantially equal to the vertical width of the code pattern along the scanning direction on the opening side, the contact surface of the code reader does not rub the code pattern during scanning, and the code pattern is damaged. Do not give.

(14) A code reader for optically reading a code pattern from a sheet-shaped recording medium on which data is printed and recorded as an optically readable code pattern. A code reader configured to manually scan the code pattern and optically read the code pattern while contacting the sheet-shaped recording medium when reading the data. A code reader characterized by a matte finish on the surface.

That is, even when a transparent resin sheet is placed on the code pattern in order to protect the code pattern, the code pattern can be smoothly slid during scanning by the code reader, and the scanning is not impaired.

(15) The code reader according to (14), wherein the satin finish is a process for forming a large number of fine uneven portions on the contact surface. That is, even when a transparent resin sheet is placed on the code pattern to protect the code pattern, the code pattern can be smoothly slid during scanning.

(16) The code reader according to (15), wherein the plurality of fine uneven portions are formed so as to be irregularly distributed on the contact surface.

That is, even when the code pattern is not covered with the transparent resin sheet, even if the code pattern is rubbed, the code pattern does not come into contact with a predetermined portion and the code pattern is not damaged.

(17) The code according to (14), wherein the contact surface is formed so as to straddle the code pattern in a width direction orthogonal to a scanning direction of the code pattern. leader.

That is, even when the transparent resin sheet is not covered on the code pattern, the code pattern is not damaged by reading by the code reader since there is no portion in contact with the code pattern.

(18) The method according to (15), wherein the contact surface is formed of a material having a small coefficient of friction, and the large number of fine irregularities are formed by molding the material. Code reader as described.

That is, it is possible to easily form the R surface at the tip of the convex portion of the unevenness, and the code pattern is not damaged even if the code pattern is not covered with a transparent resin sheet even if the code pattern is rubbed.

[0093]

As described in detail above, according to the present invention,
When scanning the code pattern manually,
A reading error is prevented as much as possible by preventing the inclination of the code reader with respect to the scanning direction. Further, the alignment of the code reader with the code pattern is easily performed, and the code pattern is prevented from being stained as much as possible. A code reader can be provided.

[Brief description of the drawings]

FIGS. 1A and 1B are a side view and a front view, respectively, showing the external shape of a pen-type code reader according to a first embodiment of the present invention, and FIG. It is a perspective view showing the appearance shape of the tip part of the pen type code reader as an embodiment.

2A is a cross-sectional view of the pen-type code reader of FIG. 1A, and FIG. 2B is a cross-sectional view taken along line BB in FIG.

FIG. 3 is a diagram showing a scanning state of a code pattern by the pen-type code reader of FIG.

FIG. 4 is a view showing a cap of the pen-type code reader of FIG.

FIG. 5 is a diagram illustrating a contact state between a contact surface of a code reader and a recording medium according to a third embodiment of the present invention.

FIG. 6 (A) shows the surface roughness (Rmax) of the contact surface and the code reader when a transparent sheet made of polyester is placed on a recording medium on which a code pattern is recorded, with a constant force applied to the transparent sheet. FIG. 7B is a diagram illustrating a relationship with load resistance when the contact surface is moved in the scanning direction in a state in which the contact surface is formed, and FIG.

FIG. 7 is a diagram for explaining an example of forming and processing a tip portion.

FIGS. 8A and 8B are a plan view and a cross-sectional view, respectively, of a code reader according to a fourth embodiment of the present invention.

FIG. 9 is a diagram illustrating a physical format configuration of a dot code which is an example of a code pattern.

FIG. 10A is an electrical functional block diagram of a code reader, and FIG. 10B is a diagram showing a code pattern scanning state by a conventional pen-type code reader.

[Explanation of symbols]

 Reference Signs List 1 dot code 2 block 3 data dot pattern section 4 marker 5 block address pattern section 6 imaging section 6A imaging field of view 7 binarization processing section 8 binarized image memory 9 restoration section 10 demodulation section 11 reproducing section 13 code pattern 22, 122 , 222 Tip 22A Opening 22B, 122B Inclination-preventing ridge 22C, 122C Groove 22D, 222D Contact surface 22E, 122E Concave 22F Concavo-convex pattern 23 Upper cover 24 Lower cover 30 Operation switch 34 Recording medium 35 Cap 35A Ridge Fitting part 37 fixed type

Claims (5)

[Claims] 1. A sheet-like recording apparatus comprising: an optical system; and an area sensor for converting an image formed by the optical system into an electric signal and outputting the electric signal, wherein data is printed and recorded as an optically readable code pattern. To optically read the code pattern from the medium, the sheet-shaped recording medium,
In a code reader configured to move by a predetermined distance and manually scan and read the code pattern while making contact with the tip surface having the imaging opening, the tip facing the code pattern of the code reader body tip portion A first groove portion having both ends opened in the scanning direction is provided on the surface, and the first groove portion is formed on two outer surfaces of the code reader body leading end portion facing the scanning direction in a longitudinal direction of the code reader body. A second groove provided along the first groove and a continuous groove. 2. A sheet-like recording apparatus comprising an optical system and an area sensor for converting an image formed by the optical system into an electric signal and outputting the electric signal, wherein data is printed and recorded as an optically readable code pattern. To optically read the code pattern from the medium, the sheet-shaped recording medium,
In a code reader configured to move by a predetermined distance and manually scan and read the code pattern while making contact with the tip end surface having the imaging opening, a code reader body tip portion facing the scanning direction in the scanning direction. On each of the two outer surfaces, two substantially parallel inclination preventing ridges protruding along the scanning direction are formed, and the distance between the two inclination preventing ridges is orthogonal to the scanning direction. The width of the code pattern is substantially equal to the width of the code pattern, and both ends are respectively opened on the two outer surfaces on the front end surface opposite to the code pattern at the tip of the code reader body. A code reader comprising a groove having a width. 3. A sheet-like recording device comprising an optical system and an area sensor for converting an image formed by the optical system into an electric signal and outputting the electric signal, wherein data is printed and recorded as an optically readable code pattern. To optically read the code pattern from the medium, the sheet-shaped recording medium,
A code reader configured to move by a predetermined distance while contacting the tip end surface having the imaging opening and to manually scan and read the code pattern. A code reader characterized in that a groove opening in a substantially U-shape is formed on one of the outer surfaces on the front end surface. 4. A sheet-like recording device comprising an optical system and an area sensor for converting an image formed by the optical system into an electric signal and outputting the electric signal, wherein data is printed and recorded as an optically readable code pattern. To optically read the code pattern from the medium, the sheet-shaped recording medium,
In a code reader configured to move by a predetermined distance and manually scan and read the code pattern while making contact with the tip end surface having the imaging opening, a code reader body tip portion facing the scanning direction in the scanning direction. On each of the two outer surfaces, two substantially parallel inclination preventing ridges protruding along the scanning direction are formed, and the distance between the two inclination preventing ridges is orthogonal to the scanning direction. A width of the code pattern in a direction substantially equal to the width of the code pattern. 5. A code reader for optically reading a code pattern from a sheet-shaped recording medium on which data is printed and recorded as an optically readable code pattern, wherein the code pattern is optically read. A code reader configured to manually scan and optically read the code pattern while contacting the sheet-shaped recording medium when reading, a contact surface of the code reader contacting at least the sheet-shaped recording medium; A code reader characterized by having a satin finish applied to it.