JPH10302019A - Optical reading sensor - Google Patents

Abstract

(57) [Problem] To make it easy to adjust a tip portion to a target signal and to adjust the position of the tip portion to a target position with high accuracy. SOLUTION: A condenser lens portion 5 including a condenser lens 51 and a lens holding portion 52 holding the condenser lens 51 at one end is integrally molded. The other end of the lens holding part 52 of the condenser lens part 5 is fixed to one end of the case 4 in which the second end of the light guide 3 is arranged. A cap 6 is provided to cover and protect the condenser lens unit 5 so as not to hinder the emission of light to the outside and the incidence of light from the outside. The diameter of the lens holding portion 52 of the condenser lens portion 5 can be made as small as the diameter of the condenser lens 51 so that the diameter and the tip portion of the outer cap 6 can be made smaller.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical reading sensor, and more particularly to an optical reading sensor commonly used for a pen for a pen input device and a pen for a bar code reader.

[0002]

2. Description of the Related Art An optical reading sensor is commonly used as a pen for inputting a coordinate position and the like in a pen input device and a bar code reading pen in a bar code reading device because of its configuration. FIG. 2 shows a typical example of such a conventional optical reading sensor. The optical reading sensor receives a first electric signal from a lead wire 7a and emits light, and emits the light from one end. Light from one end of the light emitting element 1 is incident on the first end. A light guide 3 for transmitting light to the second end and radiating the light from the second end, and transmitting light incident from the second end to the third end;
The light receiving element 2 receives the light transmitted to the end of the light guide element 2, generates a second electric signal and outputs the signal to the lead wire 7b, and collects the light emitted from the second end of the light guide 3 to the outside. A condenser lens 8 that radiates and condenses light from the outside and enters the second end of the light guide 3, a lens holding unit 41 that holds the condenser lens 8 at one end, and a condenser lens 8 A light guide section for transmitting light between the light guide element and the third end of the light guide body 3, and lead wires 7a and 7b are led out from the other end, and the light emitting element 1, the light receiving element 2, and the light guide body A case 4a for holding and housing the inside 3 and a lens holding portion 41, a light guide portion 42 and a condensing lens 8 at one end of the case 4a are used for the emission of light to the outside and the incidence of light from the outside. And a cap 6a that covers and protects the lens so as not to hinder it and secures the focal length of the condenser lens 8.

The condensing lens 8 is a spherical ball lens made of sapphire. The diameter of the cylindrical portion of the cap 6a (excluding the portion attached to the case 4a) is limited to about 5 mm due to its structure. It is. In addition, the dimension of the case 4a in the length direction with respect to the diameter is not necessarily proportional in FIG. 2, and is actually a dimension that is easy to hold and easy to handle. When this optical reading sensor is used in a bar code reader, the light emitted from the light emitting element 1 is applied to the bar code via the light guide 3 and the condenser lens 8, and the light reflected from the bar code is collected. Optical lens 8 and light guide 3
To the light receiving element 2 via the
Is transmitted to the main body of the bar code reader through the lead wire 7b.

When the optical reading sensor is used as a pen of a pen input device, for example, when inputting the coordinates of a target position on a display screen, the tip of the cap 6a of the optical reading sensor must be used. According to the target position, a signal from the target position is transmitted to the apparatus main body by other means.

[0005]

In the above-mentioned conventional optical reading sensor, a spherical condenser lens 8 is held at one end of a case 4a by a lens holder 41, and the condenser lens 8 and the lens Since the holding portion 41 is covered and protected by the cap 6 a, the diameter of the lens holding portion 41 is larger than the diameter of the condenser lens 8.
The diameter of the cylindrical part and the tip part of a becomes large,
When used as a pen of a pen input device, the cap 6a
It is difficult to see the tip, the so-called pen tip, due to the cylindrical part, it is difficult to adjust this pen tip to the target position. There was a problem.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an optical reading sensor that can easily adjust a tip portion to a target position (hereinafter, referred to as a target position) and can adjust the tip portion position to a target position with high accuracy. It is in.

[0007]

The present invention has the following structure to achieve the above object. That is, the optical reading sensor of the present invention includes a light emitting element that receives a first electric signal and emits light and emits light from one end, and a light emitted from one end of the light emitting element incident on the first end and a second light emitting element. And a light guide for emitting light from the second end and transmitting light incident on the second end to a third end, and transmitted to a third end of the light guide. A light receiving element that receives light to generate a second electric signal, and holds and accommodates the light emitting element, the light guide, and the light receiving element such that the second end of the light guide is disposed at one end. A second end of the light guide, integrally formed with a case, a condenser lens, and a cylindrical lens holder that holds the condenser lens at one end and fixes the other end to one end of the case; The light emitted to the condensing lens is condensed by the condensing lens and radiated to the outside. A condensing lens portion incident on the second end of the light body, and a portion of the condensing lens portion that protects the condensing lens portion to cover portions other than radiation to the outside and light incident from the outside; And a cap for ensuring the focal length of the lens.

Further, the condenser lens of the condenser lens section is spherical, and the outer diameter of the lens holding section of the condenser lens section is made equal to the diameter of the condenser lens.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a preferred embodiment of the present invention, a condenser lens and a cylindrical lens holder for holding the condenser lens at one end are integrally formed as a condenser lens section.
The other end of the lens holding portion of the condenser lens portion is fixed to one end of a case in which the second end of the light guide is disposed, and the condenser lens portion is radiated to the outside and emitted from the outside. The cover is protected by a cap so as not to hinder the incidence of light. Therefore, the diameter of the lens holding portion for holding the condenser lens can be reduced to about the same as the diameter of the condenser lens, so that the diameter of the cap can be reduced and the tip portion can be made thinner. , The tip is easier to see, the tip is easier to align with the target position,
The position of the tip can be adjusted to the target position with high accuracy.

[0010]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 (a) and 1 (b) are a side sectional view and an enlarged sectional view of a condenser lens unit showing an embodiment of the present invention. In this embodiment, a light emitting element 1 receives a first electric signal from a lead wire 7a and emits light, and emits the light from one end. And a light guide 3 for radiating light from the second end and transmitting light incident from the second end to a third end; and transmitting light transmitted to the third end to the third end. The light receiving element 2 which receives and generates a second electric signal and outputs it to the lead wire 7b, the second end of the light guide 3 is arranged at one end, and the lead wires 7a and 7b are arranged at the other end. A case 4 for holding and housing the light emitting element 1, the light guide 3 and the light receiving element 2;
And the condenser lens 51 is held at one end and the other end is a case 4
And a cylindrical lens holding portion 52 including a light guide portion 53 for transmitting light between the second end of the light guide 3 and the condenser lens 51 fixed to one end of the light guide 3 and integrally molded. Then, the light emitted to the second end of the light guide 3 is condensed by the condenser lens 51 and emitted to the outside, and the light from the outside is condensed by the condenser lens 51 and A condenser lens portion 5 incident on the end of
The condensing lens portion 5 is covered and protected so as not to hinder the emission of light to the outside and the incidence of light from the outside. And a cap 6 for fixing the cap 6.

In this embodiment, since the spherical condenser lens 51 and the lens holder 52 for holding the condenser lens 51 at one end are integrally formed, the diameter of the lens holder 52 is reduced. The diameter of the cylindrical portion of the outer cap 6 (excluding the portion attached to the case 4) can be made the same as the diameter of the lens 51. Compared to 5mm, for example, 3
mm, and the tip of the cap 6 can also be thin.

Therefore, the tip portion is easy to see, and when used in a pen input device, the tip portion (pen tip) can be easily adjusted to a target position. Further, since the tip portion is narrow, the position of the tip portion can be adjusted to the target position with high accuracy. In FIG. 1, the dimension of the case 4 in the length direction with respect to the diameter of the cap 6 is not necessarily proportional, and is actually easy to hold and easy to handle as in the case of FIG. 2. .

[0013]

As described above, according to the present invention, the condensing lens and the lens holding portion for holding the condensing lens at one end are integrally formed so that the diameter of the lens holding portion can be reduced. Of the condenser lens and the outer cap of the lens holding part and the dimension of the tip thereof can be made smaller than those of the conventional example. Even when used in a device, there is an effect that the tip portion is easy to see and the tip portion can be easily adjusted to a target position.
Further, there is an effect that the position of the tip portion can be adjusted to the target position with high accuracy.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention and an enlarged sectional view of a condenser lens unit.

FIG. 2 is a side sectional view showing an example of a conventional optical reading sensor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Light-emitting element 2 Light-receiving element 3 Light guide 4, 4a Case 5 Condensing lens part 6, 6a Cap 8 Condensing lens 41 Lens holding part 51 Condensing lens 52 Lens holding part

Claims (2)

[Claims] 1. A light emitting element that receives a first electric signal to emit light and emits light from one end, and that light from one end of the light emitting element is incident on a first end and transmitted to a second end. A light guide radiating from the second end and transmitting the light incident on the second end to the third end; and a second light guide receiving the light transmitted to the third end of the light guide. A light receiving element for generating an electric signal of
A case for holding and storing the light emitting element, the light guide, and the light receiving element such that the second end of the light guide is disposed at one end; a condenser lens; A light-emitting device is provided with a cylindrical lens holding portion for fixing the other end to one end of the case. A condenser lens portion that radiates light from the outside and condenses the light from the outside with the condenser lens and enters the second end of the light guide, and radiates light from the condenser lens portion to the outside and from the outside. An optical reading sensor comprising: a cap which covers a portion other than the light incident portion to protect the condenser lens portion and secure a focal length of the condenser lens. 2. The optical device according to claim 1, wherein the condenser lens of the condenser lens section is spherical, and an outer diameter of a lens holding section of the condenser lens section is equal to a diameter of the condenser lens. Reading sensor.