JP7114106B2 - Two-dimensional code reader for medical equipment - Google Patents

Description

The present invention relates to a stationary two-dimensional code reader for medical instruments that scans and reads two-dimensional codes attached to medical instruments.

Conventionally, medical institutions use a huge variety of medical instruments. The preparation and management of this vast variety of medical instruments requires a great deal of labor. In order to deal with this problem, various medical equipment management devices have been proposed. There is a reader. As such a two-dimensional code reader for medical instruments, for example, the technology disclosed in Patent Document 1 is known.

The medical device two-dimensional code reader of Patent Document 1 is a stationary device that reads a two-dimensional code in a non-contact manner. Read the two-dimensional code. Generally, a two-dimensional code is read by irradiating a two-dimensional code portion with light and reading the reflected light with a camera.

However, since the two-dimensional code is small and attached to a medical instrument made of metal, the reflected light is scattered and it is difficult to focus. It takes time to read the two-dimensional code because it is necessary to bring the medical instrument closer to the target and focus on it. In addition, if a medical device is placed on top of the device, the device and the medical device will come into contact with each other, causing damage to both, and the medical device may be stained with blood after a medical procedure, making it difficult to handle. It takes.

Also, the technology disclosed in Patent Document 2 is known as a two-dimensional code reader for medical instruments. In the two-dimensional code reader for medical instruments disclosed in Patent Document 2, an annular diffusion ring is arranged inside a cylindrical housing. diffuses to generate light in multiple directions.

An article attached with a two-dimensional code or the like is placed on a glass window provided at the end of the apparatus, and the article is illuminated from various directions by light from various directions and reflects the light. The image capturing unit captures an image of a two-dimensional code (symbol) formed by oxidation marking, an image of a symbol formed by engraving, and an image of a symbol formed on a curved surface, and produces an image corresponding to the image. A signal is provided to the reader.

However, in the medical instrument two-dimensional code reader of Patent Document 2, since articles are arranged in the form of a glass window, when a medical instrument is placed on the upper surface of the device, the device and the medical instrument come into contact with each other and both are damaged. If the article is a medical instrument after a medical procedure, it may be stained with blood or the like, and handling is troublesome. On the other hand, when the two-dimensional code is read at a position that does not touch the glass window, it still takes time to focus.

JP 2019-88550 A Japanese Patent Application Laid-Open No. 2007-310550

In view of the above points, the present invention provides a medical instrument two-dimensional code reader that can easily read a two-dimensional code attached to a medical instrument in a non-contact manner and that can shorten the focusing time. is the subject.

[1] A stationary two-dimensional code reader for medical instruments that scans and reads two-dimensional codes attached to medical instruments,
A box-shaped casing, a lid portion forming an upper surface of the casing and having an opening, a light source provided below the opening in the casing and emitting light, and the two-dimensional code. and a code reader unit having a camera unit that reads the reflected light of
The light source is provided with a first polarizing filter that transmits only a component of the light in a predetermined direction,
The camera unit is provided with a second polarizing filter that transmits only a component of the reflected light in a direction different from that of the first polarizing filter,
The camera section is tilted at a predetermined angle toward the rear side of the device.

Most conventional two-dimensional code readers for medical instruments have LEDs arranged in a ring shape, and if the medical instrument has streaks on the metal such as hairline finish, it always generates strong scattered light. It may be difficult to read because it is tucked away. In particular, when the two-dimensional code is a so-called dot marking, it becomes difficult to read when scattered light occurs. In this regard, according to the configuration of the present invention, the light source is provided with the first polarizing filter that transmits only the component of the light in a predetermined direction, and the camera unit is provided with only the component of the reflected light in the direction different from the first polarizing filter. Since the second polarizing filter is provided to transmit the light, the light is polarized and directional (irradiated from only one direction) to suppress scattered light. As a result, it is less susceptible to surface conditions such as mirror finish and hairline finish in metal medical instruments, and stable reading is possible.

In addition, most of the conventional medical instrument two-dimensional code readers are of the type in which the medical instrument is brought into contact with the medical instrument for reading in order to compensate for the difficulty in focusing. However, if blood or the like adheres, there is a risk of infection, and there are many problems with contact. Moreover, it is not preferable from the viewpoint of hygiene management to bring even a cleaned medical instrument into contact with the reading device, and mechanical wear due to contact occurs in both the reading device and the medical instrument. In this respect, according to the configuration of the present invention, the camera section is tilted toward the rear side of the device at a predetermined angle, so that the reading range can be widened (for example, conventionally about 20 mm square can be expanded to 50 mm x 40 mm). ), the focus can be adjusted by simply moving the medical instrument horizontally two-dimensionally at the same height without moving the medical instrument vertically and horizontally three-dimensionally. As described above, the present invention can easily read a two-dimensional code attached to a medical instrument without contact, and can shorten the focusing time.

[ 1 ] Preferably, the lid is provided with a black plate that partially closes the opening and adjusts a portion of the light emitted from the light source according to ambient brightness.

In general, by applying a polarizing filter, the scattered light generated from the metal surface, which interferes with reading, can be reduced. be. In that case, adjustments such as exposure time and gain that require expert knowledge are performed on site, which is disadvantageous for imaging and decoding. In order to reduce the effect of illuminance, the longer the exposure time, the clearer the image. Adjustment is not easy because the image quality is disturbed. Therefore, when imaging a two-dimensional code, it is desirable to set the exposure time and gain suitable for the ambient brightness. In this regard, according to the configuration of the present invention, the lid is provided with a black plate that partially closes the opening and adjusts part of the light emitted from the light source according to the ambient brightness. By applying part of the light from the light source to the black plate, it is possible to adjust the LED light suitable for the brightness of the surroundings without adjusting the exposure time and gain, which is advantageous for code imaging. Therefore, the two-dimensional code attached to the medical instrument can be easily read in a non-contact manner, and the focusing time can be shortened.

[ 2 ] Preferably, the light source is tilted at a predetermined angle toward the rear side of the device.

In general, medical instruments tend to deteriorate and become darker due to cleaning chemicals each time they are used. In order to read a two-dimensional code on a dark metal surface, the stronger the light, the better the imaging. Therefore, it was difficult for the conventional reader to read the code of the deteriorated instrument. In this respect, according to the configuration of the present invention, the light source is tilted at a predetermined angle toward the rear side of the apparatus, so that even if the light source is installed facing upward, even if it generates strong light advantageous for reading codes on metal, glare does not occur. can be reduced. Furthermore, since the black plate is arranged at an appropriate position so that the light from the light source is not directly visible to the worker, it is possible to further reduce glare even when strong light is generated. As a result, it becomes possible to read the code of a dark instrument that has deteriorated further, the two-dimensional code attached to the medical instrument can be easily read without contact, and the focusing time can be shortened.

[ 3 ] Preferably, the opening comprises a rectangular first opening and a second opening continuous to the front side of the device from the first opening and having a narrower width than the first opening. is formed in a convex shape as
The black plate is provided on the device front side of the second opening,
A reading area is provided in the area of the first opening.

The conventional two-dimensional code reader for medical instruments had a narrow reading range of about 20 mm square and was non-contact, so there was no problem with the reading area. It becomes difficult to understand whether it is an area. In this regard, according to the configuration of the present invention, the opening is composed of a rectangular first opening and a second opening that is continuous with the first opening on the front side of the device and narrower than the first opening. It is formed in a convex shape as a whole. The convex narrow second opening is the light path, the area there is not the reading area, but the area necessary for the light to pass through. The convex wide first opening is the reading area. In this way, by devising the shape of the opening, it is possible to make the reading area easy to understand even in a non-contact and wide area. Therefore, the two-dimensional code attached to the medical instrument can be easily read in a non-contact manner, and the focusing time can be shortened.

[ 4 ] Preferably, the light source consists of an upper LED and a lower LED,
a portion of the light from the upper LEDs is illuminated after conditioning by the black plate and the light from the lower LEDs is illuminated to a reading area;
The light from the top LED and the bottom LED is red wavelength around 560 nm to 660 nm around the peak wavelength around 627 nm.

Many conventional two-dimensional code readers for medical instruments use white light or blue light for LEDs, and in such cases, blood adhering to the code becomes dark due to those lights (combining red and blue light makes it black) However, white is mixed with blue components, so when it hits red, it becomes slightly black), making it difficult to read. In this regard, according to the configuration of the present invention, the light source is composed of the upper LED and the lower LED, and the light from the upper LED and the lower LED is light with a single wavelength close to red. Since red blood does not absorb light and can be transmitted through it, it is possible to read the two-dimensional code of a medical instrument with blood attached immediately after the end of a medical procedure. Therefore, the two-dimensional code attached to the medical instrument can be easily read in a non-contact manner, and the focusing time can be shortened.

[ 5 ] Preferably, a transparent cover made of polyvinyl chloride having a thickness of 0.1 mm to 1.2 mm is detachably arranged on the lid.

In general, even in non-contact reading, when reading a blood-stained medical device, the medical device is often brought into contact with the reader. For this reason, it is desirable to use a transparent cover. However, when the cover is used, halation (reflected light) is generated, which tends to cause reading trouble. In addition, there have been cases of breaking the glass by hitting the instrument against the glass during reading. In this regard, the inventor believes that the transparent cover made of polyvinyl chloride (PVC) and having a thickness of about 0.1 mm to 1.2 mm is effective in reducing reflection when reading the two-dimensional code of medical instruments, flexibility, and flexibility. I discovered that it is strong and suitable for glass protection. Also, by arranging a reflection absorption sheet under the camera, it is possible to reduce the influence of reflection. Therefore, the reader can be protected, the two-dimensional code attached to the medical instrument can be easily read in a non-contact manner, and the focusing time can be shortened.

It is possible to provide a medical instrument two-dimensional code reader capable of easily reading a two-dimensional code attached to a medical instrument without contact and shortening the focusing time.

1 is a perspective view of an example of a medical instrument two-dimensional code reader and a medical instrument according to the present invention; FIG. 1 is an enlarged view of a main part of a medical device two-dimensional code reader according to the present invention; FIG. It is a bottom view of the lid part around the opening. FIG. 2 is a plan view of the medical device two-dimensional code reader with the cover removed. 1 is a cross-sectional view of a main part of a two-dimensional code reader for medical instruments according to the present invention; FIG. FIG. 4 is an explanatory diagram of a code reader unit; FIG. 10 is an operation diagram of a comparative example and an example; FIG. 3 is an explanatory diagram of the two-dimensional code reader for medical instruments with a transparent cover.

An embodiment of the present invention will be described below with reference to the accompanying drawings. The figure conceptually (schematically) shows a two-dimensional code reader for medical instruments.

As shown in FIG. 1, the medical device two-dimensional code reader 10 is a stationary device that scans and reads a two-dimensional code 61 attached to a medical device 60 such as medical scissors.

As shown in FIGS. 1 and 4, the medical device two-dimensional code reader 10 includes a box-shaped housing 20 and a lid portion forming the upper surface of the housing 20 and having openings 31 and 32 formed therein. 30, and a code reader unit 40 having a light source 41 provided below the openings 31 and 32 in the housing 20 for emitting light and a camera section 43 for reading reflected light from the two-dimensional code 61. . The two-dimensional code 61 is formed in a small size on a part of the medical device 60 and is of so-called dot marking type. In the embodiment, the two-dimensional code 61 is in dot marking format, but it is not limited to this, and may be in other formats such as bar code format and symbol format.

The housing 20 includes a front portion 21, side portions 22, 22, a rear portion 23, a bottom portion 24 covering the bottom of these portions, and a lid portion 30 forming a top portion. A box-shaped housing 20 is formed from a front portion 21, side portions 22, 22, a rear portion 23, and a bottom portion 24, and the top is open. A dial type switch 25 is provided on the front portion 21 . The front portion 21, the side portions 22, 22, the rear portion 23, and the bottom portion 24 of the housing 20 are made of metal, and the lid portion 30 is made of synthetic resin. The material of the housing 20 is not particularly limited as long as it constitutes a general housing, such as metal such as aluminum and stainless steel, or synthetic resin.

As shown in FIGS. 1 to 4, the lid portion 30 covers the entire openings 31 and 32 and allows light to pass through the glass top plate 33 and part of the openings 31 and 32 while blocking the light from the light source . A black plate 34 is provided to modulate a portion of the emitted light. A glass top plate 33 is provided on the rear surface 30b of the lid portion 30, a black plate 34 is provided over the glass top plate 33, and the glass top plate 33 and the black plate 34 are supported by supporting members 35, 35, and the supporting members 35 , 35 are fastened to the rear surface 30 b of the lid portion 30 by fastening members 36 , 36 . For example, the thickness of the glass top plate 33 is 5 mm.

The openings 31 and 32 are connected to a rectangular first opening 31 and the first opening 31 on the device front side (front part 21 side) and have a width L2 narrower than the width L1 of the first opening 31 . It consists of 2 openings and 32 and is formed in a convex shape as a whole. The black plate 34 is provided on the device front side of the second opening 32 . As shown in FIG. 3B, the black plate 34 is formed with a plurality of mounting holes 34a. By inserting a fastening member 36 (see FIG. 3A) into any position of the mounting hole 34a and fastening it, the projection position of the black plate 34 toward the second opening 32 can be adjusted. You can adjust the amount of light. In FIG. 3(b), the mounting hole 34a can be adjusted in three stages in the direction of projection, but it may be adjusted in two stages or four stages. You may enable it to adjust.

As shown in FIGS. 2 to 6, the code reader unit 40 includes a housing 41 arranged below the camera section 43, a light source 42 arranged above the camera section 43, and the reflected light. and a camera unit 43 (which captures an image).

The code reader unit 40 is fixed to the bottom surface 24 of the housing 20 and supported by a bent tilt support member 26 so as to tilt toward the rear side of the apparatus at a predetermined angle. Therefore, the camera section 43 is tilted at a predetermined angle toward the rear side of the device. The light source 42 is also tilted at a predetermined angle toward the rear side of the device. The predetermined angle (tilt angle) α of the code reader unit 40 is 22.5°. In the embodiment, the predetermined angle (tilt angle) α of the code reader unit 40 is 22.5°, but it is not limited to this. Other angles such as 20° to 25° may be used as long as the angle is such that the metal surface is not reflected and the angle is optimal for reading.

Further, the light source 42 above is provided with a first polarizing filter 44 that transmits only light components in a predetermined direction. The camera unit 43 is provided with a second polarizing filter 45 that transmits only the component of the light reflected from the two-dimensional code 61 of the medical device 60 in a direction different from that of the first polarizing filter 44 . For example, the first polarizing filter 44 passes only vertical light with respect to the code reader unit 40, and the second polarizing filter 45 passes only horizontal light with respect to the code reader unit 40. It is. The transmission directions of the first and second polarizing filters may be reversed vertically and horizontally.

A reflected light absorbing sheet 46 for absorbing reflected light from the two-dimensional code 61 is provided on the housing 41 below the camera section. By providing the reflected light absorption sheet 46, it is possible to absorb the reflected light that hinders reading, and the two-dimensional code 61 can be read more quickly and accurately.

The light source 42 consists of an upper LED 42a and a lower LED 42b. Light from the upper LED 42a is applied to the black plate 34, and light from the lower LED 42b is applied to the code detection area A1. By tilting the code reader unit 40 at a predetermined angle, a wide code detection area A1 is provided above the second opening 32 . The light from the upper LED 42a and the lower LED 42b has a wavelength around red, for example, preferably around 560 nm to 660 nm around the peak wavelength of around 627 nm. Although light with a wavelength around 560 nm to 660 nm is used in the embodiment, it is not limited to this, and a wavelength of 560 nm or less or 660 nm or more may be used if the influence of blood adhesion is acceptable to some extent. Also, the camera focus is r=50 mm, and there is a depth margin of about ±5 to 10 mm. Note that the camera focus is not limited to r=50 mm, but may be 45 mm, 55 mm, 60 mm, or the like, and may be appropriately set within a predetermined range as long as it is in focus.

As shown in FIGS. 2 and 5, the range of the black plate 34 is the diffused light generation area S1, the range of the second opening 32 without the black plate 34 is the polarization passing area S2, and the area of the first opening 31 is the polarized light passing area S2. The range of the central portion becomes the reading area S3. The range of the reading area S3 is as wide as 50 mm long×40 mm wide.

Portions of the first opening 31 wider than the second opening 32 (both ends of the first opening 31) are polarized light escape areas S4, S4 for letting polarized light escape. By providing the polarized light escape areas S4, S4, it is possible to prevent light unnecessary for reading from entering the camera section 43, and to read the two-dimensional code 61 more quickly and accurately.

Also, the code reader unit 40 is connected with a decoding unit 50 for converting a captured image into alphanumeric information, and the decoding unit 50 is connected with a PC 51 having various calculations and a display section.

The two-dimensional code 61 can be read by moving the medical instrument 60 as shown by arrow (1) and directing the two-dimensional code 61 downward in the detection area A1. Since the code reader unit 40 is arranged in a tilted manner, the detection area A1 is tilted, so the medical device 60 only needs to be moved substantially horizontally, and there is no need to move it up and down as indicated by arrow (2). Become. Therefore, the two-dimensional code 61 can be easily read.

Next, the action of the comparative example will be described.
As shown in (a) of FIG. 7, the two-dimensional code reader 100 for medical instrument of the comparative example is provided with a code reader unit 102 parallel to the bottom portion 101 of the housing. The code reader unit 102 includes light sources 103 , 104 , 105 and a camera section 104 . The code reader unit 102 is provided with a glass top plate 107 above and is connected to a PC 109 via a decoding unit 108 .

The medical device two-dimensional code reader 100 of the comparative example is irradiated with light from light sources 103 and 104 as indicated by arrows (3) and (4), respectively. The irradiated light is reflected by the two-dimensional code 61, and part of the reflected light travels toward the camera section 43 as indicated by arrow (5). At this time, part of the reflected light travels to a portion other than the camera section 106 of the code reader unit 102 as indicated by arrow (6), and is reflected as indicated by arrow (7). Therefore, halation occurs, and the time required to read the two-dimensional code 61 is lengthened.

Next, the operation of the embodiment will be described.
As shown in FIG. 7(b), in the medical device two-dimensional code reader 10 of the embodiment, the code reader unit 40 is arranged at an angle. Light is obliquely emitted from the lower LED 42b to the rear side opposite to the operator as indicated by an arrow (8). Therefore, the operator can easily move the medical instrument 60 without worrying about the light.

The irradiated light is reflected by the two-dimensional code 61, and part of the reflected light travels toward the camera section 43 as indicated by arrow (9). Also, the light emitted from the upper LED 42a is blocked by the black plate 34 according to the size of the black plate 34 as indicated by an arrow (10). For this reason, it has a moderate brightness that makes it easy to read the area around the two-dimensional code 61 . Part of the reflected light travels to the reflected light absorbing sheet 46 of the code reader unit 40 as indicated by arrow (11). At this time, the reflected light is absorbed by the reflected light absorption sheet 46 and is not reflected as indicated by the arrow (12), thereby preventing halation and facilitating reading.

Next, a medical instrument two-dimensional code reader 10 according to another aspect will be described.
As shown in FIG. 8, a transparent cover 55 made of polyvinyl chloride having a thickness of 0.1 mm to 1.2 mm is detachably arranged on the lid portion 30 of the housing 20 . As a result, the effect of reducing reflection when reading the two-dimensional code of the medical instrument 60, flexibility, strength, and glass protection can be achieved.

Next, the operation and effect of the medical instrument two-dimensional code reader 10 described above will be described.

In an embodiment of the present invention, according to the configuration of the present invention, the light source 42 is provided with a first polarizing filter 44 that transmits only light components in a predetermined direction, and the camera unit 43 is provided with the first polarizing filter for reflected light. Since the second polarizing filter 45 is provided to transmit only the component in the direction different from that of 44, the light is polarized and directed (irradiated only from one direction) to suppress scattered light. As a result, the metal medical instrument 60 is less susceptible to surface conditions such as mirror finish and hairline finish, and stable reading is possible.

Furthermore, in the embodiment of the present invention, the camera section 43 is tilted toward the rear side of the apparatus at a predetermined angle, so that the reading range can be widened (for example, the range of about 20 mm square in the past can be expanded to about 50 mm x 40 mm). It is possible to adjust the focus by simply moving the medical device 60 horizontally at the same height in two dimensions without moving the medical device 60 vertically and horizontally in three dimensions. Thus, according to the present invention, the two-dimensional code 61 attached to the medical instrument 60 can be easily read in a non-contact manner, and the focusing time can be shortened.

Furthermore, in the embodiment of the present invention, the lid 30 is provided with a black plate 34 that partially closes the opening 32 and adjusts a portion of the light emitted from the light source 42. A portion of the light is applied to the black plate 34 so that the light is suitable for the work environment. As a result, even the light filtered through the first polarizing filter 44 has an amount of light suitable for the surroundings, and it is possible to match the work environment without readjusting the exposure time and gain on site, which is advantageous for code imaging.

Furthermore, in the embodiment of the present invention, the light source 42 is tilted at a predetermined angle toward the rear side of the apparatus, so that even when installed facing upward, glare is not generated even when the strong light is generated which is advantageous for reading codes on metal. can be reduced. Furthermore, since the black plate 34 is arranged at an appropriate position so that the light from the light source 42 is not directly visible to the worker, glare can be further reduced even if strong light is generated.

Furthermore, in the embodiment of the present invention, the openings 31 and 32 are a rectangular first opening 31 and a second narrower opening 31 that is continuous with the first opening 31 on the device front side and narrower than the first opening 31 . It consists of an opening 32 and is formed in a convex shape as a whole. The convex, narrow second opening 32 is the light path, and the area there is not the reading area, but the area necessary for the light to pass through. A convex wide first opening 31 is a reading area. Thus, by devising the shape of the openings 31 and 32, it is possible to make the reading area easy to understand even in a non-contact and wide range.

Furthermore, in the embodiment of the present invention, the light source 42 is composed of upper and lower LEDs 42a and lower LEDs 42b arranged in two rows, and the light emitted from the upper LEDs 42a and lower LEDs 42b is nearly red light with a single wavelength. Since the red blood adhering to 61 can transmit light without causing light absorption phenomenon, it is possible to read the two-dimensional code 61 of the medical instrument 60 with blood adhering immediately after the end of medical treatment. .

In addition, when the dots of the two-dimensional code 61 are to be read, it is necessary to blacken the metal surface and capture the reflected light from the two-dimensional code 61 portion. , the light from the light source 42 is reflected on the metal surface, interfering with reading. Therefore, the two-dimensional code 61 needs to be tilted with respect to the camera section 43 and the light source 42, but it is difficult for the human side to always adjust the tilt to the optimum. In this regard, in the embodiment of the present invention, the camera section 43 and the light source 42 are installed at an angle that does not reflect the metal surface and is optimal for reading. For this reason, the operator can apply the two-dimensional code 61 parallel to the surface of the glass top plate 33, or in a state where the code is slanted to some degree, thereby facilitating reading.

Although the housing 20 is box-shaped in the embodiment, it is not limited to this, and may be cylindrical. In addition, although the light source 42 uses LEDs arranged in two stages above and below, the number of stages of LEDs may be three or more.

That is, the present invention is not limited to the examples as long as the action and effects of the present invention are exhibited.

The two-dimensional code reader for medical instruments of the present invention is suitable for reading two-dimensional codes attached to medical instruments.

DESCRIPTION OF SYMBOLS 10... Medical instrument two-dimensional code reader, 20... Housing, 26... Inclined support member, 30... Cover, 31... First opening (opening), 32... Second opening (opening), 33... Glass top plate 34 Black plate 40 Code reader unit 42 Light source 42a Upper LED (light source) 42b Lower LED (light source) 43 Camera unit 44 First polarizing filter 45 Second 2 polarizing filter, 46 reflected light absorption sheet, 55 transparent cover, 60 medical instrument, 61 two-dimensional code (symbol).

Claims (5)

A stationary two-dimensional code reader for medical instruments that scans and reads two-dimensional codes attached to medical instruments,
A box-shaped casing, a lid portion forming an upper surface of the casing and having an opening, a light source provided below the opening in the casing and emitting light, and the two-dimensional code. and a code reader unit having a camera unit that reads the reflected light of
The light source is provided with a first polarizing filter that transmits only a component of the light in a predetermined direction,
The camera unit is provided with a second polarizing filter that transmits only a component of the reflected light in a direction different from that of the first polarizing filter,
tilting the camera unit toward the rear side of the device at a predetermined angle;
A two-dimensional medical instrument , wherein the cover is provided with a black plate that partially closes the opening and adjusts a part of the light emitted from the light source according to the ambient brightness. code reader. The medical device two-dimensional code reader according to claim 1 ,
A two-dimensional code reader for medical equipment, wherein the light source is inclined at a predetermined angle toward the rear side of the device. The medical device two-dimensional code reader according to claim 1 or claim 2 ,
The opening has a rectangular first opening and a second opening that is continuous with the first opening on the device front side and narrower than the first opening, and is formed in a convex shape as a whole. ,
The black plate is provided on the device front side of the second opening,
A two-dimensional code reader for medical instruments, characterized in that a reading area is provided in the region of the first opening. The medical instrument two-dimensional code reader according to any one of claims 1 to 3 ,
the light source consists of an upper LED and a lower LED;
a portion of the light from the upper LEDs is illuminated after conditioning by the black plate and the light from the lower LEDs is illuminated to a reading area;
A two-dimensional code reader for medical equipment, wherein the light emitted from the upper LED and the lower LED has a red wavelength of 560 nm to 660 nm before and after having a peak wavelength of 627 nm. The medical device two-dimensional code reader according to any one of claims 1 to 4 ,
A two-dimensional code reader for medical instruments, wherein a transparent cover made of polyvinyl chloride having a thickness of 0.1 mm to 1.2 mm is detachably arranged on the cover.

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