JPS5840164B2 - optical device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical device for forming an image of an object to be read through an optical system in an optical reading device.

FIG. 1 shows a conventional optical device in an optical reader.

That is, in an optical device having a structure in which an object to be read A is irradiated and the reflected light passes through the lens barrel assembly 1 and forms an image on the imaging section 2, the holding member 3 into which the lens barrel assembly 1 is fitted is attached. A method has been adopted in which the surface 3a is provided in contact with the photoelectric element 4 having the imaging section 2, and when a predetermined value of output is obtained by imaging, the surface 3a is fixed by a fixing process using an adhesive 5 or the like.

However, in this method, a predetermined output is obtained for the object A by artificial means, and the mounting surface 3a is
Because it is fixed to a fixed position, there are many problems with variations in adjustment values, ensuring perpendicularity and levelness, and there are also drawbacks such as a lack of work efficiency, reliability, and compatibility.

The present invention has been made in view of the above circumstances, and its purpose is to provide an optical device that has a relatively simple configuration, has compatibility, and can mechanically assemble an optical system with high reliability. That is.

The present invention will be explained below based on an embodiment shown in FIGS. 2 to 9.

Figures 8 and 9 show an optical reading device,
Reference numeral 10 denotes a housing consisting of divisible main body force bars 1 1A, 1 1B and a reading position regulating cover 12 that can be attached and detached to the tips of the main body force bars 11A, IIB.
A holding portion z24 into which the lens barrel assembly 13 is fitted is provided inside each of the lenses 1A and 11B.

The irradiation lamp (not shown) of the reading device irradiates the object A, and the reflected light passes through the lens barrel assembly 13 and onto the photoelectric element mounting plate 15 attached to one end of the holding member 14. The image is formed on an image forming section 16 of , and converted into an electric signal by a photoelectric element 17 and guided to a code 18 .

Therefore, the holding member 14 of the lens barrel assembly 13 is placed at the reading position as a means for irradiating the object A to be read and using the reflected light to form a predetermined image on the imaging section 16 via the lens barrel assembly 13. The regulating cover 12 positions the object A to be read, while the photoelectric element mounting plate 1 having the imaging section 16
A good image cannot be obtained unless the mounting surface 15a to which the lens 5 is attached is at right angles R1, R2, and R3, respectively, as shown in FIGS. 2 to 4.

Therefore, to install the lens barrel assembly 13, insert the processing reference shaft 19 using the hole 14a, and process it so that it forms right angles R1, R2, and R3 with respect to the axis 19a of this reference shaft 19 (for example, Surface processing or shim pasting, etc.) to obtain a flat surface.

After the plane is determined in this way, the right angle dust R4 is determined on the jig polar using the axis 19a as a reference.

Then, as shown in FIG. 4, a pilot hole 14b is bored at position 11 or 12, and a pilot pin 20 is driven into this pilot hole 14b.

Next, the photoelectric element 17, which has been previously mounted on the photoelectric element mounting plate 15, is inserted into the positioning hole 15a using the pilot pin 20 as a guide, as shown in FIG.

Therefore, the assembly is completed by applying an adhesive (not shown) to the mounting surface 15b of the mounting plate 15 and pressing it.

Note that at this time, the machining reference shaft 19 is removed.

As explained above, the reading position regulating cover 12 is placed on the object to be read A with the holding member 14 as a reference.

A lens barrel assembly 13 can be placed in between,
Further, the photoelectric element 17 having the image forming part 16 fixed to the mounting surface 15a through the photoelectric element mounting plate 15 is mounted on the mounting surface 15a.
The three-dimensional guarantee (a) and the position guarantee (2) and 12 (12) allow mechanical adjustment of the optical system.

After that, the main body covers 11A and 11B shown in FIGS. 8 and 9 are combined with the holding member 14, and the cord 1
By forming a handle 11c that also serves as a drawer of 8, the accuracy of the optical system can be maintained regardless of the main body covers 11A and 11b.

As explained above, according to the present invention, the reading position regulating cover is attached to the holding member, the lens barrel assembly is also attached to the holding member, and the photoelectric element having the image forming part is also attached to the mounting plate. Since the optical system is attached to the holding member, accuracy can be ensured using the holding member as a reference, and a three-dimensional surface and mounting hole can be obtained using the lens barrel mounting hole of the holding member as a processing reference, so high accuracy can be achieved. It has excellent effects such as being able to secure the same information and also providing compatibility.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a conventional optical device, Fig. 2 is a plan view of an optical device showing an embodiment of the present invention, Fig. 3 is a front view of the same device, and Fig. 4 is a rear view thereof. Figure 5 is a surface diagram showing the relationship between the photoelectric element and the mounting plate, Figure 6 is its front view, Figure 7 is a front view showing the holding member assembly, and Figure 8 is an optical reader with an incorporated optical device. A plan view of the device, and FIG. 9 is a front view of the device. 14... Holding member, 13... Lens tube assembly, 14a... Hole (hole for mounting), 19...
...Reference axis for processing, 15...Photoelectric element mounting plate, 15b...Mounting surface, 14b...
Pilot hole, 20...Pilot pin, 15
, 17...Photoelectric element mounting assembly (photoelectric element mounting plate, photoelectric element).

Claims (1)

[Claims] 1. Attachment of a holding member, a hole into which the lens barrel assembly is inserted and fixed, a processing reference axis temporarily inserted into this hole, and a photoelectric element mounting plate machined at right angles to this reference axis. a pilot hole for positioning on the mounting surface machined based on the reference axis, a pilot pin driven into the pilot hole, and a photoelectric element mounting assembly guided by the pilot pin and mounted on the mounting surface. 3D and
A device consisting of a lens barrel assembly into which the above-mentioned processing reference shaft is pulled out and inserted and fixed.