JPH0765099A - Unit structure of optical equipment - Google Patents

Abstract

PURPOSE:To provide the compact unit structure of the optical equipment (bar code reader) capable of extending the degree of freedom in mounting. CONSTITUTION:By making a body front unit 40 be capable of mounting by converting the 1st surface 42 and the 2nd surface 44 adjacent to each other by the prescribed angle, the light transmission and receiving directions (G and H directions) of light transmission and reception parts 50 and 55 mounted on the body front unit 40 can be simply changed to the prescribed angle. Thus, the device can be made compact by unnecessitating the parts required to change the light transmission and receiving directions and the degree of freedom in mounting the bar code reader in the light transmission and receiving directions can be extended.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical system device,
Particularly, it relates to the unit structure of the bar code reader.

[0002]

2. Description of the Related Art Generally, a bar code is composed of a bar (black) and a space (white) having different thicknesses. When the laser light is projected from the light emitting / receiving unit (scanner) onto the bar code by the bar code reader, the received light is absorbed in the black part of the bar of the bar code, and the light is diffusely reflected in the white part of the space. To be done. Then, the laser reflected light corresponding to the state of this bar code is received,
The barcode data is recognized depending on its strength.

In a production facility or the like, a bar code reader of a type (amplifier integrated type) in which a scanner is integrally incorporated in a main body is often used in order to recognize a product by a bar code attached to the product. .

FIG. 6 shows the structure of a conventional bar code reader 2 of this type integrated with an amplifier. The barcode reader 2 includes a light emitting / receiving unit (scanner) 4, an operation display unit 6, and an input / output unit 8. A scanner window 12 is provided in the front part of the housing 10 of the bar code reader 2, and the laser light and the laser reflected light of the light emitting and receiving part 4 are passed therethrough. Further, a power supply connector 22 and an I / O connector 24 of the input / output unit 8 are provided at the rear part to connect the power supply cable 14 and the I / O cable 16.

FIG. 7 shows the structure of the scanner 4. The scanner 4 is composed of a scanner block 50 including a light source 51, a collimator lens 52, a condenser lens 53, and a light receiving sensor 54, and a polygon mirror 55. Laser light L emitted from the light source (laser diode) 51
_The collimator lens 52 converts ₁ into parallel light of an appropriate size. Then, the light is reflected by the rotating polygon mirror 55, passes through the scanner window 12 and is projected onto the barcode 5, and the scanning operation is performed. The laser light L ₁ is the reflected laser light L ₂ reflected on the barcode 5.
Then, the light passes through the scanner window 12 again, and is received by the light receiving sensor 54 via the polygon mirror 55 and the condenser lens 53. Upon receiving the optical signal received by the light receiving sensor, the analysis unit 57 analyzes the barcode 5.

Then, the read data of the analyzed bar code 5 is displayed on the operation display unit 6. In the input / output unit 8, an input / output operation between the read data and an external CPU (not shown) is performed through the I / O cable 16, and power is supplied by the power cable 14.

Conventionally, such a bar code reader has been used.

[0008]

However, the conventional bar code reader has the following problems.

There is a case where it is desired to rotate only the direction of projecting and receiving laser light by approximately 90 degrees with the bar code reader 2 attached as it is because of restrictions on the equipment space.
In this case, as shown in FIG.
Although it is possible to rotate it by about 90 degrees (H direction), there is a problem that it requires additional parts such as the reflection plate 20 and a mounting space, which conflicts with miniaturization. .

Further, in order to reduce the size, it is indispensable to reduce the heat generated from the power supply unit of the input / output unit 8, and a cooling fan 18 or the like is often installed. However, due to this, internal air convection occurs, and the polygon mirror 55, the collimator lens 52, the condenser lens 53, etc. of the scanner 4 (see FIG. 7).
There was also a problem that dust was attached to and was erroneously recognized.

Further, depending on the installation condition of the bar code reader 2, the characters and numbers of the read data displayed on the operation display section 6 are reversed and difficult to see, and the read data may be erroneous, or the power cable 14, I / There is a problem that it may be difficult to connect the O cable 16 to the input / output unit 8.

An object of the present invention is to solve the above problems and to provide a unit structure of an optical system device (bar code reader) which can realize a reduction in size and increase the degree of freedom in mounting.

[0013]

According to a first aspect of the present invention, there is provided a unit structure for an optical system device, comprising: a light projecting / receiving part, an operation display part, an input / output part, and a housing body for housing each part. A housing front unit having first and second surfaces adjacent to each other at a predetermined angle is provided so as to be separable from the housing main body, and a light emitting and receiving unit is attached to the housing front unit, and light is projected and received from one of the surfaces. In addition, the case front unit can be attached to the case body with the first surface and the second surface thereof being opposite to each other.

The unit structure of the optical system instrument according to claim 2 is:
The unit structure of the optical system device according to claim 1 is characterized in that the light emitting and receiving portion has a dustproof structure.

The unit structure of the optical system instrument according to claim 3 is:
The unit structure of the optical system device according to claim 1, wherein a housing rear surface unit having first and second surfaces adjacent to each other at a predetermined angle is provided so as to be separable from the housing main body, and the input / output unit is the rear surface of the housing. The unit is attached to the unit so that input / output can be performed from one side thereof, and the rear unit of the casing can be attached to the casing main body with the first face and the second face being reversed from each other. I am trying.

The unit structure of the optical system instrument according to claim 4 is:
The unit structure of the optical system according to claim 1 is characterized in that the operation display portion is attached to the housing upper surface unit, and the housing upper surface unit can be attached to the housing main body by rotating 180 degrees.

[0017]

In the unit structure of the optical equipment according to the first aspect of the present invention, the housing front unit can be attached by arranging the first surface and the second surface, which are adjacent to each other, at a predetermined angle so as to be opposite to each other. The light emitting / receiving direction of the light emitting / receiving unit attached to the body front unit can be easily changed to a predetermined angle. Therefore, it is possible to increase the degree of freedom in mounting the optical system device in the light projecting / receiving direction while making it possible to reduce the size by eliminating the parts required for changing the light projecting / receiving direction.

In the unit structure of the optical system according to the present invention, since the light emitting / receiving unit is attached to the front unit of the housing in a state where the light emitting / receiving unit is separated from the main body of the housing, only the light emitting / receiving unit has a dustproof structure. There is. Therefore, it is not necessary to make the entire optical system device a dustproof structure, the structure is simplified, and the cost can be reduced.

According to the third aspect of the present invention, in the unit structure of the optical system device, the rear unit of the housing can be mounted by reversing the first surface and the second surface adjacent to each other at a predetermined angle. The attachment direction of the connection cable connected to the body rear unit can be easily changed to a predetermined angle.
Therefore, the degree of freedom in mounting the optical system device in the mounting direction of the connection cable can be increased.

In the unit structure of the optical equipment according to the fourth aspect of the present invention, since the housing upper surface unit can be mounted by being rotated by 180 degrees, the read data of the operation display unit mounted on the housing upper surface unit can be displayed. The display direction can easily be reversed. Therefore, the degree of freedom in mounting the optical system device in the display direction of the read data can be improved.

[0021]

FIG. 2 shows a unit structure of an optical system device (bar code reader) 30 according to an embodiment of the present invention. The bar code reader 30 includes a housing front surface unit 40, a housing upper surface unit 60, a housing rear surface unit 70, and a housing body 80 to which each unit is detachably attached.

The front housing unit 40 includes the scanner window 1
Except for 2, it has a bilaterally symmetrical shape about the surface M ₁ , and a light projecting / receiving section (scanner) 4 is attached to the inside thereof. The casing upper surface unit 60 has a shape symmetrical with respect to the point T ₁ except for the operation surface 62 and the display surface 64, and the operation display unit 6 is attached to the lower side thereof. In addition, the housing rear surface unit 70 includes the power connector 22, I /
Except for the O connector 24, it has a symmetrical shape with respect to the plane M ₂ , and an input / output section 8 such as a power supply section is attached to the inside thereof.

As described above, since the bar code reader 30 has a unit structure in which the respective units can be separated and has a symmetrical shape, the respective units are attached to the housing body 80 even when they are rotated by 180 degrees. It is designed to be used. Hereinafter, the configuration of each unit will be described in detail.

FIG. 1 shows the structure of the housing front unit 40. In FIG. 1A, the housing front surface unit 40 includes the first surface 4 adjacent to each other at a predetermined angle (in this example, approximately 90 degrees).
2, has a second surface 44.

In this example, the first unit of the front housing unit 40 is
Inside the surface 42, the scanner 4 in which the scanner block 50 and the polygon mirror 55 are placed on the table 45 is attached. The scanner block 50 includes a light source 51, a collimator lens 52, a condenser lens 53, and a light receiving sensor 54.
(See FIG. 7). On the other hand, the second surface 44 is opened and has the scanner window 12 through which the laser light from the scanner 4 passes. In this state, the housing front unit 40 is fixed to the housing main body 80 by mounting screws (not shown) through the mounting holes 56.

The laser beam L ₁ emitted upward from the light projecting port 58 of the scanner block 50 and reflected by the polygon mirror 55 passes through the scanner window 12 and is projected onto the bar code in the G ₁ direction. The reflected laser light L ₂ reflected on the bar code passes through the scanner window 12 again, is reflected by the polygon mirror 55 in the G ₂ direction, is received by the light receiving port 59 of the scanner block 50, and is reflected by the bar code. Is read.

Here, due to the restrictions on the equipment space, etc., the mounting state of the bar code reader 2 remains unchanged,
In some cases, it may be desired to swing the laser light projection / reception direction by approximately 90 degrees from the G direction (H direction). The state of the housing front unit 40 at this time is shown in FIG. 1b. In this case, the housing front unit 40 is attached to the housing body 80 after being rotated 180 degrees from the state of FIG. 1a. As shown in FIG. 1b, the laser light L ₁ is emitted downward from the light projecting port 58 of the scanner block 50. And the polygon mirror 5
It is reflected by 5, passes through the scanner window 12, and is projected onto the bar code in the H ₁ direction. The reflected laser light L ₂ reflected on the bar code passes through the scanner window 12 again, is reflected by the polygon mirror 55 in the H ₂ direction, is received by the light receiving port 59 of the scanner block 50, and the bar code is read. To be

Since the optical adjustment of the scanner 4 has already been performed in the state shown in FIG. 1a, even if the light emitting / receiving direction of the scanner 4 is changed from the G direction to the H direction, the optical adjustment is not necessary and the scanner 4 is used as it is.

As described above, the direction in which the laser light is projected and received can be changed by approximately 90 degrees only by changing the mounting state of the housing front unit 40. As a result, the degree of freedom in attaching the barcode reader 30 in the light emitting / receiving direction can be increased.

Further, unlike the prior art, parts such as a reflecting plate for changing the light projecting direction by 90 degrees are unnecessary, and the bar code reader 30 can be miniaturized.

Furthermore, since the housing body 80 and the scanner 4 are separable from each other, it is easy to maintain the optical part on site.

In this example, the first surfaces 4 adjacent to each other are
2, the angle of the second surface 44 is about 90 degrees, but 45
It may be up to 135 degrees.

Next, FIG. 3 shows a state in which the scanner 4 attached to the front unit 40 of the housing has a dustproof structure.
Shown in. Scanner 4 is a dustproof sponge (made of urethane)
It is covered with a dustproof case 48 to which 46 is attached. This can prevent dust and the like from adhering to optical parts such as the polygon mirror, the collimator lens, and the condenser lens.

This is because the housing body 80 and the scanner 4 can be separated from each other, so that the scanner 4 having a particularly high need for dust protection can be independently provided with a dust protection structure. Therefore, the entire bar code reader 30 does not need to have a dustproof structure, the structure is simple, and the cost can be reduced. Further, since it is not necessary to make the entire bar code reader 30 a dustproof structure, the power supply unit of the input / output unit 8 can be opened to provide a highly efficient heat dissipation structure. Miniaturization is possible.

Next, FIG. 4 shows the structure of the housing upper surface unit 60. As shown in FIG. 4A, the housing upper surface unit 60 is opened and the operation display section 6 having the operation surface 62 and the display surface 64 as the upper surfaces is attached. The operation display unit 6 displays the read data of the barcode read and analyzed by the scanner 4 on the display surface 64. The numbers and characters of the read data displayed on the display surface 64 can be easily read from the J direction.

Here, there is a case where it is desired to change the display direction of the operation surface 62 and the display surface 64 to the K direction which is approximately 180 degrees opposite from the J direction with the bar code reader 30 attached as it is. The state of the housing upper surface unit 60 at this time is shown in FIG. 4B. In this case, the housing upper surface unit 60 is similar to that shown in FIG.
It is rotated 180 degrees from the state of a and attached to the housing body 80. Thereby, the numbers and characters of the read data displayed on the display surface 64 can be easily read from the K direction.

As described above, the display direction of the read data can be reversed by approximately 180 degrees only by changing the mounting state of the housing upper surface unit 60. Thereby, the barcode reader 3 in the display direction of the read data
The degree of mounting freedom of 0 can be expanded.

Next, FIG. 5 shows the structure of the rear unit 70 of the housing. In FIG. 5A, the housing rear surface unit 70 has a first surface 72 and a second surface 74 which are adjacent to each other at a predetermined angle (in this example, approximately 90 degrees). In this example, the first surface 7
2, a power supply connector 22 and an I / O connector 24 are provided.

Inside the unit, an input / output section 8 including a power source section (not shown) and the like is attached. The input / output unit 8 supplies power by the power cable 14 and an external CPU (not shown) by the I / O cable 16.
I / O operations with and.

In this figure, the power cable 14, I /
The O cable 16 is attached in the G direction.

Here, due to restrictions on the equipment space, etc., the attachment state of the bar code reader 2 remains unchanged,
In some cases, it may be desired to swing only the mounting direction of the power cable 14 and the I / O cable 16 from the G direction by approximately 90 degrees (H direction). The state of the rear unit 70 of the housing at this time is shown in FIG.
Shown in b. In this case, the rear unit 70 of the housing is shown in FIG.
It is rotated 180 degrees from the above state and attached to the housing body 80. The power cable 14 and the I / O cable 16
The mounting position is upside down with respect to FIG. 5a.

In this way, the power cable 14, I /
The mounting direction of the O cable 16 can be changed by approximately 90 degrees. As a result, the degree of freedom in attaching the barcode reader 30 in the attaching direction of the connection cable can be increased.

In this example, the first surfaces 7 adjacent to each other are
2, the angle of the second surface 74 is about 90 degrees, but 45
It may be up to 135 degrees.

In this embodiment, a bar code reader is used as an optical system device, but it may be used for a photoelectric detector, for example.

[0045]

According to the unit structure of the optical system device (bar code reader) of the first aspect of the present invention, the front unit of the housing can be attached with the first surface and the second surface, which are adjacent to each other, at a predetermined angle. By doing so, it is possible to easily change the light projecting / receiving direction of the light projecting / receiving section attached to the front unit of the housing to a predetermined angle. Therefore, it is possible to increase the degree of freedom in mounting the optical system device in the light projecting / receiving direction while making it possible to reduce the size by eliminating the parts required for changing the light projecting / receiving direction.

The unit structure of the optical system instrument according to claim 2 is:
Since the light emitter / receiver is attached to the front unit of the housing in a state where it is separated from the main body of the housing, only the light emitter / receiver has a dust-proof structure. Therefore, it is not necessary to make the entire optical system device a dustproof structure, the structure is simplified, and the cost can be reduced.

The unit structure of the optical system instrument according to claim 3 is:
Since the first and second surfaces of the rear unit of the housing that are adjacent to each other at a predetermined angle can be mounted opposite to each other, the mounting direction of the connection cable connected to the rear unit of the housing can be easily determined. You can change the angle. Therefore,
The degree of freedom in mounting the optical system device in the mounting direction of the connection cable can be increased.

The unit structure of the optical system instrument according to claim 4 is:
Since the housing upper surface unit can be attached by rotating 180 degrees, the display direction of the read data of the operation display unit mounted on the housing upper surface unit can be easily reversed. Therefore, the degree of freedom in mounting the optical system device in the display direction of the read data can be improved.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a housing front surface unit of an optical system device (bar code reader) according to an embodiment of the present invention.

FIG. 2 is a diagram showing a unit structure of an optical system device (bar code reader) according to an embodiment of the present invention.

FIG. 3 is a diagram showing a dustproof structure of a front unit of the housing.

FIG. 4 is a diagram showing a configuration of a housing upper surface unit.

FIG. 5 is a diagram showing a configuration of a housing rear unit.

FIG. 6 is a diagram showing a conventional barcode reader.

FIG. 7 is a diagram showing a configuration of a scanner.

FIG. 8 is a diagram showing a conventional barcode reader.

[Explanation of symbols]

12 ... Scanner window 40 ... Housing front unit 42 ... First surface 44 ... Second surface 50 ... Scanner block 55 ... Polygon mirror 58 ... Light emitting port 59 ...・ Light receiving port L ₁・ ・ ・ Laser light L ₂・ ・ ・ Laser reflected light

Claims (4)

[Claims] 1. An optical system device comprising a light emitting / receiving unit, an operation display unit, an input / output unit, and a housing body for housing each unit, the optical system device having first and second surfaces adjacent to each other at a predetermined angle. The front housing unit is provided so as to be separable from the main housing body, and the light emitting and receiving unit is attached to the front housing unit so that light is emitted and received from only one surface of the front housing unit. On the other hand, the first side and the second
The unit structure of the optical equipment is characterized in that it can be installed with the surfaces reversed. 2. The unit structure of an optical system device according to claim 1, wherein the light emitting / receiving unit has a dustproof structure. 3. The unit structure for an optical system device according to claim 1, wherein a housing rear surface unit having first and second surfaces adjacent to each other at a predetermined angle is provided so as to be separable from the housing body. Is attached to the rear unit of the housing, and input / output is performed from one surface of the rear surface unit.
The unit structure of the optical equipment is characterized in that it can be installed with the surfaces reversed. 4. The unit structure of the optical device according to claim 1, wherein the operation display section can be directly attached to the housing upper surface unit, and the housing upper surface unit can be attached to the housing body by rotating 180 degrees. , The unit structure of optical system equipment.