JPS6121704Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a barcode reader that reads a barcode by scanning the barcode.

Conventionally, as a barcode reader, a photoreflector for transmitting and receiving light is attached to the tip of a ventil-shaped case body, and the photoreflector is covered and light from the photoreflector and reflected light from the barcode pass through. It is known that a cap is attached with an opening at the tip. In this type of barcode reader, light from a light-emitting element built into a photoreflector is irradiated onto the barcode from the opening of the cap via a light-emitting lens, and the reflected light of this irradiated light is sent to the light-receiving element of the photoreflector. The light is received by the light receiving element via
The received light is converted into an electrical signal and guided to an electrical circuit within the case body, thereby reading the barcode.

However, in the case of the above-mentioned barcode reader, since the opening formed at the tip of the cap is small, simply attaching the photoreflector and the cap to the case body will cause the photoreflector to be attached to the opening of the cap. is tilted or
Or, the photoreflector may wobble during use, and as a result, light from the light emitting element of the photoreflector may not be collected properly at the opening, and the light reflected on the barcode may not be received properly by the light receiving element through the opening. As a result, there was an inconvenience that the information on the barcode could not be read accurately. Therefore, a circuit (for example, AGC) is required to keep the input fluctuation constant, which has the disadvantage of increasing costs.

This idea was made taking the above points into consideration, and its purpose is to allow the photoreflector to be easily and accurately attached to the cap, and to prevent the photoreflector from wobbling during use. To provide a barcode reader which can be easily mounted without any problems, which can read barcodes accurately and well, and which can simplify the circuitry.

Hereinafter, one embodiment of this invention will be described in detail based on the drawings. 1 in the figure is a barcode reader, and this barcode reader 1 scans the barcode 3 displayed on the paper surface 2 to convert the information of the barcode 3 into an electrical signal and read it. . Therefore, the barcode reader 1 includes a case body 4, a holder 5 attached to the tip of the case body 4, a photoreflector 6 housed in the holder 5, and a photoreflector 6. It consists of a cap 7. That is, the case body 4 is composed of an upper case 4a and a lower case 4b which are curved into a semicircular arc shape, and when these are put together, it has a substantially cylindrical configuration, and furthermore, there is a printed circuit board inside the case body 4. 8 is arranged on the tip side (left side in FIG. 2), and each case 4a, 4b on this tip side
By cutting out the outer periphery of the mounting portions 9a and 9b are formed in these portions.

Further, the holder 5 is formed by integrally forming a fitting portion 5a that fits into the mounting portions 9a and 9b of each of the cases 4a and 4b, and a storage recess 5b that accommodates the photoreflector 6. That is, the fitting portion 5
a has a substantially cylindrical shape, and is formed so that its inner diameter is equal to the outer diameter of the mounting portions 9a and 9b, and its outer diameter is equal to the outer diameter of the case body 4. Further, the storage recess 5b has a partition wall 5c.
A substantially cylindrical member formed back to back with the fitting portion 5a with the inner diameter thereof being approximately equal to the outer diameter of the photoreflector 6, and the depth thereof being approximately equal to the size of the photoreflector 6. Moreover, its outer diameter is formed to be equal to the inner diameter of the case body 4. In this case, a threaded groove 10 is formed on the outer circumferential surface of the storage recess 5b, and its tip (the left end in FIG. 2) is cut out along the circumferential direction, making the wall thickness thinner. .
Further, in the partition wall 5c formed in the middle of the holder 5, through holes 11 are formed that penetrate from the side of the storage recess 5b to the side of the fitting part 5a. This through hole 1
1... are the ones through which the lead wires 6a... of the photoreflector 6 are inserted.

The photoreflector 6 is a cylindrical member that is stored in the storage recess 5b of the holder 5 via an elastic body 12 such as rubber, and is stored with its tip slightly protruding from the storage recess 5b. Inside it, there is a light emitting element, a light emitting lens that collects and irradiates the light of this light emitting element, and a bar code 3.
a light-receiving lens that collects the reflected light of the light irradiated on the
A light-receiving element that receives the light collected by the light-receiving lens is built-in. Moreover, at the rear end of the photoreflector, the through holes 11 of the holder 5...
Lead wires 6a, which are connected to lead terminals 8a, of the printed circuit board 8 through the lead wires 6a, are provided corresponding to each element.

Further, the cap 7 is attached to the holder 5 to fix the photoreflector 6 in the storage recess 5b, and has a generally pointed cylindrical shape overall. Inside this cap 7 is a recess 7a which is approximately the same as the outer shape of the storage recess 5b of the holder 5.
is formed. A thread groove 13 that is screwed into the thread groove 10 is formed on the inner peripheral surface of the recess 7a that corresponds to the thread groove 10 of the storage recess 5b.
Further, a contact surface 14 is formed at the bottom of the recess 7a (a portion on the tip side of the cap 7), with which the peripheral edge of the tip of the photoreflector 6 comes into contact. An opening 15 is formed therethrough. This opening 15 is
It is a substantially conical hole that is large on the side of the photoreflector 6 and small on the tip side of the cap 7, and the light from the light emitting element of the photoreflector 6 passes through the opening 15 via the light emitting lens and is irradiated onto the barcode 3. This is so that the reflected light of the reflected light passes through the opening 15 and is received by the light receiving element via the light receiving lens.

A lid 16 is attached to the end of the case body 4 (upper part in FIG. 1), which encloses the upper case 4a and the lower case 4b. A cord 17 is attached to the lid 16 for connecting an electric circuit inside the case body 4 to a predetermined device (not shown).

Next, the case of assembling the barcode reader 1 as described above will be explained. In this case, first, the elastic body 12 is attached to the rear end of the photoreflector 6. That is, after the lead wires 6a provided at the rear end of the photoreflector 6 are passed through the elastic body 12, the elastic body 12 is brought into close contact with the rear end surface of the photoreflector 6. Thereafter, the photoreflector 6 is stored in the storage recess 5b of the holder 5, and each lead wire 6a is inserted into each through hole 11 of the partition wall 5c, and each end of the lead wire 6a is inserted into the fitting part of the holder 5. 5a side. In this case, the photoreflector 6 is stored in the storage recess 5b via the elastic body 12, and is stored with its tip slightly protruding from the storage recess 5b. After this, the cap 7 is attached to the holder 5. That is, the threaded groove 13 of the cap 7 is screwed into the threaded groove 10 provided on the outer peripheral surface of the storage recess 5a, and the contact surface 14 of the cap 7 is brought into contact with the tip end surface of the photoreflector 6. Thereby, the photoreflector 6 is fixed in the storage recess 5b of the holder 5 while being elastically supported between the contact surface 14 and the elastic body 12. Furthermore, after this, each lead wire 6a of the photoreflector 6 is connected to each terminal 8a of the printed circuit board 8 by soldering, and each mounting portion 9 of the upper case 4a and lower case 4b is
a, 9b into the fitting part 5a of the holder 5, then attach the lid 16 to the upper end of each case 4a, 4b, and adjust each part.

Next, a case where the barcode reader 1 constructed as above is used will be described. In this case, a constant output voltage is applied in advance to the lead wires 6a and 6b corresponding to the light emitting element of the photoreflector 6. Then, in this state, when the barcode reader 1 is scanned over the barcode 3 displayed on the paper surface 2, the light from the light emitting element built in the photoreflector 6 passes through the opening 15 of the cap 7 via the light emitting lens and is irradiated onto the barcode 3. The irradiated light is collected from the opening 15 and is received by the light receiving element via the light receiving lens.
The received light is converted into an electrical signal and inputted to the printed circuit board 8 via the leads 6a and 6b. As a result, the brightness of the bar code 3 represents the magnitude of the electrical signal, and the bar code 3 is read.

Therefore, the barcode reader 1 as described above
In this case, since the photoreflector 6 is in elastic contact with the contact surface 14 of the cap 7 by the elastic body 12, the photoreflector 6 is not tilted with respect to the opening 15 of the cap 7, and the holder 5 Even when the cap 7 is fixed well in the storage recess 5b, it is elastically supported by the elastic body 12, so even if the cap 7 is strongly tightened to the holder 5, the photoreflector 6 will not be damaged. Since no unreasonable force is applied, no distortion occurs inside the photoreflector 6, and even when the barcode reader 1 is used, the photoreflector 6 does not fit into the storage recess 5.
Since there is no wobbling inside b, the photoreflector 6 can transmit and receive light well, and the barcode 3 can be read accurately, and the photoreflector 6 can transmit and receive light well. Input fluctuations are eliminated, and barcodes 3 can be read accurately without the need for a circuit that stabilizes input fluctuations, which facilitates circuit design and fabrication.

In the above embodiment, the elastic body is provided between the photoreflector and the holder, but the present invention is not limited to this, and the elastic body may be provided between the photoreflector and the cap. Various other modifications can be made without departing from the gist of the present invention.

As explained above, according to the barcode reader according to the invention, a holder is attached to the tip of the case body having a substantially cylindrical shape, a cap is provided at the tip of the holder, and the interior of the cap and the holder is The photoreflector is housed in the holder, and an elastic body is provided on at least the leading edge or the rear edge of the photoreflector, and the photoreflector is crimped between the holder and the cap, so that the photoreflector is elastic. Because the photoreflector is held inside the cap and holder by the body, the photoreflector is well fixed against the opening of the cap without tilting, and even if the cap is strongly tightened to the holder, no excessive force is applied to the photoreflector. , the photoreflector is held well, and when it is used, the photoreflector does not wobble inside the storage, so the photoreflector can transmit and receive light well, making it possible to read barcodes accurately. As the photoreflector sends and receives light well, it eliminates the need for a circuit that keeps input fluctuations constant (for example, AGC), resulting in lower costs and easier circuit design and manufacturing, among other benefits. There is

[Brief explanation of the drawing]

FIG. 1 is an external perspective view showing the barcode reader according to the invention in use, and FIG. 2 is a sectional view of the main part thereof. 1...Barcode reader, 3...Barcode,
4...Case body, 5...Holder, 5b...Storage recess, 6...Photoreflector, 7...Cap, 12...Elastic body, 15...Opening.

Claims (1)

[Scope of utility model registration request] A barcode consisting of a substantially cylindrical body, a holder attached to the tip of the body, a cap attached to the tip of the holder, and a photoreflector housed in a circular portion between the holder and the cap. A barcode reader comprising: an elastic body provided on at least a peripheral edge of a leading end or a peripheral edge of a trailing end of the photoreflector; and the photoreflector is crimped and fixed between the cap and the holder.