JP2011108071A - Handy type code reader - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a reduction in light-dark contrast, by preventing light which is emitted from a light source and reflected at a code from being accepted by a photodetection unit. <P>SOLUTION: The handy type code reader 1 reading a code 53 formed on a surface 51 of a translucent substrate 50 includes: an illumination suppressing means which prevents light emitted from a blue light emission unit 25 from being illuminated on the code 53; and a photodetection unit 30 which receives light which is emitted from the blue light emission unit 25, enters the substrate 50 from an area outside the code 53 on the surface 51, and is output to the outside of the substrate 50 from the inside of the substrate 50 through the code 53. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a handy type code reader for reading a code formed on a transparent substrate.

  Patent Document 1 discloses a technique for reading a code formed on a transparent substrate. Specifically, light is applied to the surface of the barcode portion from the light projecting portion, and the light transmitted through the barcode portion, that is, the light transmitted through the light transmitting portion of the barcode portion is reflected by the reflection plate, and the reflected light is reflected. When the light receiving unit receives light, the code is read.

Japanese Patent Laid-Open No. 10-240858

  The above-described technique aims to read the code by identifying the size and position of the light-shielding portion of the barcode portion using the light transmitted through the barcode portion. However, according to the above-described technique, although it is desirable for the light receiving unit to receive only the light transmitted through the barcode part, the light emitted from the light source and reflected by the light shielding part in the barcode part is also included. There is a problem in that light is received and the contrast between light and darkness decreases. As a result, there was a problem that the code could not be read accurately. In addition, a conventional dynamic (cubic) reader employs a method in which, for example, illumination is performed from the back surface of a liquid crystal panel and an image is acquired by transmitted light from a portion where no metal is deposited on the code. Unlike such a system, the handy system solves the problem. (The conventional dynamic type has a limitation on the size of the substrate and is not suitable for a large liquid crystal panel.)

  The main object of the present invention is to provide a handy code reader capable of suppressing a decrease in contrast between light and dark by suppressing a situation in which light emitted from a light source and reflected by a code is received by a light receiving element. Is to provide a device.

  A handy type code reader of the present invention is a handy type code reader for reading a code formed on a surface of a light-transmitting substrate, and the code is irradiated with light emitted from a light source. An irradiation suppressing means for suppressing light emitted from the light source, incident on the surface from an area outside the code on the surface, and passed through the code from the substrate and output to the outside of the substrate; And a light receiving element.

  According to said structure, it can suppress that the light radiate | emitted from the light source is irradiated to a code | cord | chord by an irradiation suppression means. Therefore, not only the light emitted from the light source and entering the substrate from the area outside the code on the surface and passing through the code from the substrate and output to the outside of the substrate, but also the light emitted from the light source and reflected by the code Can be prevented from being received by the light receiving element. Accordingly, it is possible to suppress a decrease in contrast between light and dark and accurately read the code.

  It is preferable that the irradiation suppressing means is a light shielding member arranged on a straight line connecting the light source and the cord.

  According to said structure, it can interrupt | block that the light radiate | emitted from the light source is irradiated to a code | cord | chord from the board | substrate outside by an irradiation suppression means. Therefore, it is possible to prevent the light emitted from the light source and reflected by the cord from being received by the light receiving element. Accordingly, it is possible to prevent the contrast between light and dark from being lowered and to read the code more accurately.

  In addition, the handy type code reader of the present invention may include a support member having an inclined surface that is inclined so as to rise in a direction from the light source toward the irradiation suppressing unit, to which the light source is attached. According to this configuration, the light source is attached to the inclined surface that is inclined so as to rise in the direction from the light source to the irradiation suppressing means. It can be made incident. Therefore, it is possible to increase the amount of light output from the inside of the substrate to the outside of the substrate through the translucent portion of the cord. Therefore, the code can be read more accurately.

  The code reader of the present invention may further include a package for holding the light source, the light source may be a light emitting diode, and the irradiation suppressing unit may be a light shielding portion of the package.

  According to the above configuration, the package can block the light emitted from the light emitting diode from being applied to the code from outside the substrate. Therefore, it is possible to prevent the light emitted from the light emitting diode and reflected by the cord from being received by the light receiving element. Accordingly, it is possible to prevent the contrast between light and dark from being lowered and to read the code accurately.

  According to the handy type code reader of the present invention, it is possible to suppress the light emitted from the light source from being applied to the code by the irradiation suppressing means. Therefore, not only the light emitted from the light source and entering the substrate from the area outside the code on the surface and passing through the code from the substrate and output to the outside of the substrate, but also the light emitted from the light source and reflected by the code Can be prevented from being received by the light receiving element. Accordingly, it is possible to suppress a decrease in contrast between light and dark and accurately read the code.

1 is an overall perspective view of a handy type code reading device according to a first embodiment of the present invention. It is sectional drawing along the height direction of the handy type code reader shown in FIG. It is detail drawing of the base of the handy type code reader shown in FIG. It is the figure which showed the mode at the time of reading a code with the handy type code reader shown in FIG. It is the figure which showed the mode at the time of reading a code with the handy type code reader which concerns on the 2nd Embodiment of this invention. It is the figure which showed the mode at the time of reading a code with the handy type code reader which concerns on the 3rd Embodiment of this invention. It is the figure which showed the mode at the time of reading a code | cord | chord with the handy type | mold code reader which performed the design change which concerns on the 2nd Embodiment of this invention.

  The handy type code reader 1 according to the first embodiment of the present invention, as shown in FIG. 1, has a vertically long shape slightly inclined with respect to its height direction, and weighs about 100 g. It is a lightweight device. The code reader 1 can read the target code by aligning with a code on the substrate (hereinafter sometimes referred to as a target code). The positioning of the code reading device 1 with respect to the target code means that the code reading device 1 is arranged so that the target code is accommodated in the through-hole 21 when viewed from the height direction of the code reading device 1 as described later. Say that.

  The code reading device 1 electrically connects a base 20 located at the bottom, a cylindrical casing 4 connected to the base 20, and a computer (not shown) and a light receiving unit 30 in the casing 4, for example. An electric cord 5 is provided. The casing part 4 has substantially the same height as the entire code reader 1, and an opening part 2 penetrating in the width direction is provided in the lower part. And the through-hole 21 of the base part 20 located under the casing part 4 becomes visible by the opening part 2, and, thereby, the object cord can be aligned in the through-hole 21.

  As shown in FIG. 2, in the casing portion 4, there are a light receiving portion 30 located substantially in the center with respect to the height direction of the casing portion 4, and a red light emitting portion 7 located between the base portion 20 and the light receiving portion 30. Is provided. The light receiving unit 30 includes a light receiving lens 32 and a light receiving element 31. When the code is read, the light receiving lens 32 condenses the light that has passed through the through hole 21 and entered the casing unit 4 on the light receiving element 31. The light receiving element 31 converts the received light into electric charges. The read electrical information is sent to an external computer or the like via the electrical code 5, and the target code is identified in the computer. In addition, the computer can perform processing for each light of different colors.

  The red light emitting unit 7 is provided in the vicinity of the opening 2 at a position that does not overlap with the light receiving lens 32 when viewed from the height direction of the code reading device 1. The red light emitting unit 7 is provided so as to face the through hole 21 of the base 20, and a bullet-type LED 7 a is installed in a groove formed in a portion facing the through hole 21 in the light-shielding holding member 7 b. ing. That is, the red light emitting unit 7 has a bullet-type LED 7a. When reading the code, the bullet-type LED 7a installed in the groove of the holding member 7b emits red light from the groove of the holding member 7b, that is, the portion facing the through hole 21. The light passes through the through-hole 21 and is applied to the target code, and the light reflected at the light-shielding portion of the target code passes through the through-hole 21 again and enters the casing portion 4. Then, when the light receiving element 31 of the light receiving unit 30 receives this light, the information of the target code can be read. That is, the red LED 7a is bright-field illumination, and the image obtained by the bright-field illumination looks dark because the light-shielding portion of the target code appears brighter due to the reflected light and the transmission portion of the target code does not reflect. Therefore, it is suitable for reading a code directly stamped on metal or the like or a code formed on a liquid crystal substrate on which a backlight is mounted.

  Referring to FIGS. 2 and 3, the base 20 is provided along a reference plane A to be described later, that is, a support plate 24 parallel to a plane orthogonal to the height direction of the code reader 1, and an outer edge of the support plate 24. And an eight blue light emitting section 25 and a light shielding member 26 attached to the support plate 24.

  The outer frame 23 is a frame provided along the outer edge of the support plate 24 on the side opposite to the side where the casing portion 4 is disposed with respect to the support plate 24. The outer frame 23 protrudes in a direction away from the support plate 24 with respect to the thickness direction of the support plate 24, and the end thereof is the lowermost part of the code reading device 1. Therefore, when the code reader 1 is aligned with the target code, the code reader 1 can be fixed to the substrate by bringing the end of the outer frame 23 into contact with the substrate. At this time, the end portion of the outer frame 23 forms a reference plane A parallel to the surface of the substrate together with an end portion of a light shielding member 26 described later.

  The support plate 24 is provided between the reference plane A and the light receiving element 31 with respect to a direction orthogonal to the reference plane A, and has a through-hole 21 that is an opening penetrating in the thickness direction. The through-hole 21 has a quadrangular shape and is provided at a position facing the light receiving element 31 when viewed from the direction orthogonal to the reference plane A, and is larger than the range in which the target code is formed on the substrate. It has almost the same size. With such a structure, since the target code can be directly viewed through the opening 2 and the through-hole 21, the code reader 1 can be easily aligned with the code.

  The light shielding member 26 is provided so as to surround the through hole 21 on the side opposite to the side where the casing portion 4 is disposed with respect to the support plate 24. The light shielding member 26 protrudes to the same position as the outer frame 23 in the direction away from the support plate 24 with respect to the thickness direction of the support plate 24. That is, the end of the light shielding member 26 in the thickness direction of the support plate 24 is also the lowest part of the code reading device 1. Therefore, when the end portion of the outer frame 23 contacts the substrate on which the target code is formed, the end portion of the light shielding member 26 also contacts the substrate. Accordingly, the end surface of the outer frame 23 and the end portion of the light shielding member 26 constitute a reference plane A. When the code reader 1 is aligned with the target code, the light blocking member 26 is positioned on a straight line connecting each of the eight blue light emitting units 25 and the target code.

  The eight blue light emitting portions 25 are provided so as to surround the light shielding member 26 on the side opposite to the side where the casing portion 4 is disposed with respect to the support plate 24. In the eight blue light emitting portions 25, each two blue light emitting portions 25 are arranged along each square side of the through-hole 21.

  Each of the blue light emitting portions 25 includes a light shielding package 25b attached to the support plate 24, an LED chip 25c embedded in a groove of the package 25b, and a blue light emitting diode 25a made of an encapsulating resin. When the code is read, that is, when the code reading device 1 is aligned with the code, the blue LED 25a embedded in the groove is not in contact with the package 25b, that is, from the portion facing the reference surface A to the reference surface. Blue light is emitted conically toward A.

  As will be described later, when reading the code, the light emitted from the blue LED 25a and incident on the substrate is received by the light passing through the light-transmitting portion of the target code and again passing through the through-hole 21 and entering the casing portion 4. When the light receiving element 31 of the unit 30 receives light, the information of the target code can be read. That is, in the blue LED 25a, the light-transmitting portion of the target code looks bright due to the light that has passed through, and the light-shielding portion of the target code looks dark because no light passes through it.

  Next, with reference to FIG. 4, a state when the code 53 formed on the surface 51 of the light-transmitting substrate 50 is read will be described in detail. Here, the code is read using only the light emitted from the blue light emitting unit 25. For example, the substrate 50 is a glass substrate for a large liquid crystal panel, and the code 53 includes a light shielding portion 53a and a light transmitting portion. 53b. The light shielding portion 53a and the light transmitting portion 53b are formed, for example, by printing on a metal vapor deposition film on the substrate 50 by laser printing.

  FIG. 4 shows a state in which the substrate 50 having the code 53 to be read is disposed on the cushioning material 60. At this time, it is assumed that the cord 53 does not contact the cushioning material 60 and the bottom surface 55 facing the surface 51 of the substrate 50 and the cushioning material 60 abut. The buffer material 60 has a light-transmitting property or can diffuse light in the buffer material 60. Examples of the buffer material include a highly foamed polyethylene sheet, foamed polyethylene, foamed polystyrene, foamed material. Polypropylene, cellular cushioning material and the like are suitable. Nonwoven fabrics and transparent plates such as acrylic and polycarbonate are also suitable. In the case of a transparent plate such as acrylic or polycarbonate, it is more effective to carry out a diffusion effect.

  Next, the code reader 1 is aligned with the code 53 on the substrate 50. Specifically, the code reading device 1 is arranged on the substrate 50 while looking at the opening 2 so that the code 53 is accommodated in the through-hole 21 of the code reading device 1 when viewed from a direction orthogonal to the reference plane A. At this time, the end of the outer frame 23 of the code reading device 1 and the end of the light shielding member 26 are brought into contact with the surface 51. Therefore, the reference plane A formed by the end portion of the outer frame 23 and the end portion of the light shielding member 26 is parallel to the surface 51.

  When the blue LED 25a of the blue light emitting unit 25 is caused to emit light by a power source (not shown), blue light is emitted from the blue LED 25a toward the reference plane A in a conical shape. At this time, when viewed from the direction orthogonal to the reference plane A, the cord 53 is accommodated in the through hole 21, that is, is located within a range surrounded by the light shielding member 26. That is, since the light shielding member 26 is disposed on a straight line connecting each blue LED 25 a and the cord 53, it blocks light traveling from the blue LED 25 a toward the cord 53. Thereby, the light emitted from the blue LED 25a is not irradiated to the cord 53 from the outside of the substrate 50. In addition, a part of the light emitted from the blue LED 25 a enters the substrate 50 from a range not surrounded by the light shielding member 26 on the surface 51.

  A part of the light incident on the substrate 50 reaches the position facing the code 53 while being reflected by the bottom surface 55 and the surface 51 in the substrate 50, passes through the translucent portion 53 b of the code 53, and passes through the substrate 50. Emits outside. Further, part of the light incident on the substrate 50 passes through the bottom surface 55 and enters the surface of the buffer material 60 or the buffer material 60, and is reflected on the surface of the buffer material 60 or diffused in the buffer material 60. Then, the light again enters the substrate 50 from the bottom surface 55. Then, the light incident on the substrate 50 passes through the light transmitting portion 53 b of the code 53 and is emitted to the outside of the substrate 50. Thus, the light that has passed through the light transmitting portion 53 b of the cord 53 and has exited the substrate 50 is received by the light receiving element 31 of the light receiving unit 30. Then, the read electrical information is sent to a computer connected by the electrical cord 5, and the code is identified.

  Although a suitable material such as the buffer material 60 has been presented as the background of the substrate 50 having the reading code 53 described above, the buffer material 60 of the transported substrate that is most efficient in reading work is used as a reflection plate or a diffusion plate. However, it is not limited to the buffer purpose (shock absorption / protection). In other words, light is transmitted or diffused except when the background color is low, such as black, or when the background color is complementary to the color of the light emitting part (light source), or when only specular reflection such as a mirror surface is used. Any material that diffuses or diffusely reflects light may be used.

  According to the embodiment described above, the light shielding member 26 can block the light emitted from the blue LED 25a from being applied to the cord from outside the substrate. Therefore, not only the light emitted from the blue LED 25a and entering the substrate from the area outside the cord on the surface, passing through the light transmitting portion of the cord from the inside of the substrate, and output to the outside of the substrate, is emitted from the blue LED 25a. It is possible to prevent the light reflected by the code 53 from being received by the light receiving element 31. Accordingly, it is possible to prevent the contrast between light and dark from being lowered and to read the code accurately.

  Further, since the end of the light shielding member 26 contacts the substrate when reading the code, the light shielding member 26 can reliably block the light emitted from the blue LED 25a from being irradiated on the code from the outside of the substrate. . Therefore, it is possible to reliably prevent the light emitted from the blue LED 25a and reflected by the cord from being received by the light receiving element 31. Therefore, it is possible to more reliably prevent the contrast between light and dark from being lowered and to read the code more accurately.

  The end portion of the above-described light shielding member 26 may be capable of preventing the light emitted from the blue LED 25 a from being applied to the cord 53 from the outside of the substrate 50, and may not be in contact with the substrate 50. Of course, if there is no problem in use, it goes without saying that the end of the light shielding member 26 may abut against the substrate.

  Further, by aligning the through hole 21 of the support plate 24 and the code, the code reader 1 can be easily aligned with the code.

  Further, since the light shielding member 26 is provided so as to surround the through hole 21, when the through hole 21 of the support plate 24 and the cord are aligned, the light emitted from the plurality of blue LEDs 25 a and reflected by the code is reflected. A situation in which light is received by the light receiving element 31 can be reliably prevented.

  Next, with reference to FIG. 5, a second embodiment in which changes are made to the above-described embodiment will be described. However, components having the same configuration as those of the above-described embodiment are denoted by the same reference numerals and description thereof is omitted as appropriate.

  The handy type code reader 101 according to the second embodiment includes four support plates 124 instead of the support plate 24. Each of the four support plates 124 is a plate member having a quadrangular surface. The four support plates 124 are provided between the reference surface A and the light receiving element 31 in the direction orthogonal to the reference surface A, and are arranged so as to form a cross when viewed from the direction orthogonal to the reference surface A. ing. That is, the cavity 121 is formed so as to be surrounded by the four support plates 124. The cavity 121 has a size slightly larger than the through hole 21. The cavity 121 plays the same role as the through hole 21.

  Each of the four support plates 124 has an inclined surface 124 a that is inclined so as to rise in a direction approaching the cavity 121 on the side opposite to the side where the casing portion 4 is disposed. Two blue light emitting portions 25 are attached to each inclined surface 124 a, that is, the four support plates 124 have eight blue light emitting portions 25. More specifically, each of the two blue light emitting portions 25 is attached to each inclined surface 124 a along one side of each support plate 124. That is, the four blue light emitting portions 25 provided on the two support plates 124 facing each other are disposed at positions sandwiching the light receiving element 31 as viewed from the direction orthogonal to the reference plane A. The four support plates 124 are electrically connected by wiring or the like, and power is supplied to the eight blue light emitting units 25 as in the first embodiment described above.

  In the present embodiment, the light shielding member 26 is fixed to the casing portion 4 by a support member (not shown) instead of the four support plates 124. The light shielding member 26 is provided along the cavity 121 so as to surround a range facing the light receiving element 31 when viewed from a direction orthogonal to the reference plane A. Therefore, as in the first embodiment, the light shielding member 26 is positioned on a straight line connecting each of the eight blue light emitting units 25 and the target code when the code reader 101 is aligned with the target code.

  Thus, it can be seen that each inclined surface 124a is inclined so as to rise in the direction from the two blue light emitting portions 25 attached to the inclined surface 124a toward the light shielding member 26. In other words, each inclined surface 124 a is inclined in a direction from the two blue light emitting units 25 attached to the inclined surface 124 a toward the light receiving element 31.

  When the code is read by such a code reading device 101, the light emitted from the blue LED 25a is more actively introduced into the substrate 50 than in the first embodiment in a range not surrounded by the light shielding member 26 on the surface 51. Light can be incident. In this case, the blue light emitting unit 25 enters the blue light in a conical shape, but the incident conical light has the highest light intensity at the center. The inclination angle of the blue light emitting unit 25 is set so that the strongest center of the light is incident on the substrate 50. Therefore, the light incident on the substrate 50 can easily reach the portion of the substrate 50 facing the code 53.

  According to the embodiment described above, each inclined surface 124a is inclined in the direction from the two blue light emitting units 25 attached to the inclined surface 124a toward the light receiving element 31, and therefore, the code reader 101 is attached to the code. Then, it is possible to positively enter light into the substrate 50 at the surface. Therefore, it is possible to increase the amount of light output from the inside of the substrate to the outside of the substrate through the translucent portion of the cord. Further, in the light emitted in a conical shape from the blue light emitting unit 25 of the first embodiment described above, a direction different from the light shielding member 26 when viewed from the direction orthogonal to the reference plane A (the outer frame 23 of the code reading device 1). Side) can be used positively. Therefore, the code can be read more accurately.

  Next, with reference to FIG. 6, a third embodiment in which the first embodiment is modified will be described. However, components having the same configuration as those of the above-described embodiment are denoted by the same reference numerals and description thereof is omitted as appropriate.

  The handheld code reader 201 according to the third embodiment does not include the light shielding member 26 in the first embodiment. Therefore, only the end of the outer frame 23 constitutes the reference plane A. Instead, the code reading apparatus 201 includes a support plate 224 provided at a position closer to the reference plane A than the support plate 24 in the direction orthogonal to the reference plane A. Similar to the support plate 24, the support plate 224 has a through hole 21 and eight blue light emitting portions 25 are attached. As described above, the blue LED 25a made of the LED chip 25c and the encapsulating resin is embedded in the groove of the package 25b.

  Since the support plate 224 is provided at a position close to the reference plane A, the eight blue light emitting units 25 attached to the support plate 224 are arranged at positions slightly separated from the reference plane A. Thereby, when the code is read, that is, when the through hole 21 and the target code are aligned, the light from the blue LED 25a of the blue light emitting unit 25 is not irradiated to the target code from outside the substrate. Further, since it can be provided close to the opening 21 (closer to the side portion of the cord), the amount of light output from the inside of the substrate through the light transmitting portion of the cord to the outside of the substrate can be increased. it can. That is, in this embodiment, it can be said that the package 25b is a light shielding member that blocks the light emitted from the blue LED 25a from being applied to the cord from outside the substrate.

  According to the embodiment described above, the package 25b can block the light emitted from the blue LED 25a from being applied to the cord. Therefore, it is possible to prevent the light emitted from the blue LED 25a and reflected by the cord from being received by the light receiving element 31. Accordingly, it is possible to prevent the contrast between light and dark from being lowered and to read the code accurately.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various design changes can be made to the above-described embodiments as long as they are described in the claims. Is possible.

  In the above-described embodiment, the code 53 that is formed on the surface of the light-transmitting substrate 50 and includes the light-shielding portion and the light-transmitting portion has been described as the reading target. Not only the thing which printed and formed the light-shielding part and the transmission part, but the symbol (DPM: Direct Parts Marking) etc. which were directly printed or stamped on the light-transmitting board | substrates, such as glass, are included. In addition to substrates, codes printed on ampoules and containers molded with light-transmitting objects such as glass and resin used in the medical industry, etc., or codes with a transparent seal with barcodes attached (Including the case where the cord is placed on a light-transmitting object).

  Further, two types of light sources, the red light emitting unit 7 and a blue light emitting unit 25 described later, irradiate the irradiation target (code and substrate) together, collect the light on the light receiving element 31, and identify the target code in the computer. May be. At this time, the computer can acquire an image illuminated with two colors and extract an image of each color component. Therefore, it is suitable for a code that can appropriately obtain a desired image with both the light emitted from the blue light emitting unit 25 and the light emitted from the red light emitting unit 7, and the accuracy can be improved by identifying both. Further, the better image may be selected and identified.

  In the second embodiment, the blue LED 25a is attached to the inclined surface 124a in order to cause the light emitted from the blue LED 25a to enter the substrate from a portion closer to the region where the code is formed on the surface of the substrate. Other methods may be used. For example, as shown in FIG. 7, the shape of the package that holds the blue LED 25 a may be changed so that the blue LED 25 a faces the portion of the reference plane A that faces the cavity 121.

  In the third embodiment, the eight blue light emitting portions 25 are arranged at positions slightly separated from the reference plane A, but the blue light emitting portions 25 may not be separated from the reference plane A. That is, the support plate 224 may be disposed at a position closer to the reference plane A, and the end of the blue light emitting unit 25 together with the end of the outer frame 23 may constitute the reference plane A. In this case, since the end of the blue light emitting unit 25 contacts the substrate when reading the code, it is possible to more reliably block the light emitted from the blue LED 25a from being applied to the code from outside the substrate.

DESCRIPTION OF SYMBOLS 1 Code reader 21 Through-hole 24 Support plate 25a Blue light emitting diode 25b Package 25c LED chip 26 Light shielding member 31 Light receiving element 101 Code reader 124 Support plate 124a Inclined surface 224 Support plate

Claims (4)

A handy code reader for reading a code formed on the surface of a light-transmitting substrate,
Irradiation suppression means for suppressing light emitted from a light source from being irradiated on the cord;
A light receiving element that receives light emitted from the light source and entering the substrate from a region outside the code on the surface and passing through the code from the substrate and output to the outside of the substrate. A handy code reader characterized by comprising:   The handheld code reader according to claim 1, wherein the irradiation suppressing means is a light shielding member arranged on a straight line connecting the light source and the code.   The handy type according to claim 1 or 2, further comprising a support member having an inclined surface attached to the light source and inclined so as to rise in a direction from the light source toward the irradiation suppressing means. Code reader. A package for holding the light source;
The light source is a light emitting diode;
The handy code reader according to claim 1, wherein the direct irradiation suppressing means is a light shielding portion of the package.

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