JPH0517760U - Hand scanner type bar corder - Google Patents

Abstract

(57) [Summary] [Purpose] To simplify the structure, downsize the equipment, and improve the efficiency of the irradiation light to the bar code image. [Structure] A lens-attached dustproof cover, which is formed by integrally molding a condensing cylindrical lens on a transparent plastic plate, is attached to a light emitting / receiving opening of a case.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand scanner type bar code reader, and more particularly to a structure in which a special dust-proof cover is provided in an opening for projecting and receiving light of a case.

[0002]

[Prior Art]

 As shown in FIG. 3, the hand scanner type bar-coord reader has an irradiating unit including a light emitting diode 2 and a condensing cylindrical lens 3 in a case 1 of the main body. An optical path refracting mirror 4 for reading a bar code image, an optical lens 5, and a reading section including a CCD (charge-coupled device) 6 and the like are provided, and a case 1 is provided at the tip of the case. A transparent plastic dustproof cover 8 is fitted and fixed in the light projecting / receiving opening 7.

[0003]

[Problems to be solved by the device]

 Since the dust-proof cover 8 made of plastic and the condensing cylindrical lens 3 provided inside the main body 1 are provided separately, not only the structure is complicated, but also the equipment is large in size. In particular, since a light ray causes a loss of about 10% or more each time it passes through an optical member such as a lens, the transmittance is remarkably reduced by both of the dust-proof cover 8 and the concentrating cylindrical lens 3. Further, if the condensing cylindrical lens 3 is interposed between the light emitting diode 2 and the dustproof cover 8, there is a disadvantage in that the optical path length is inevitably lengthened due to the structure and the illuminance is lowered.

Therefore, an object of the present invention is not only to simplify the structure, but also to reduce the length of the optical path, improve the illumination, and downsize the equipment. To provide.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is characterized in that a lens-attached dustproof cover, which is formed by integrally molding a cylindrical lens on a transparent plastic plate, is attached to a light emitting / receiving opening of a case. To do.

[0006]

[Action]

 The lens-attached dust-proof cover itself prevents dust from entering the inside of the case, and the integrally attached cylindrical lens collects the emitted light from the light-emitting diode to cover it. -It irradiates the code surface intensively, so that a single member simultaneously exerts the dustproof function and the light condensing function.

[0007]

【Example】

 A hand scanner type bar code reader according to the present invention will be described in detail below with reference to an embodiment shown in the drawings.

FIG. 1 shows a hand scanner type bar code reader of the present invention in one embodiment, in which a case 11 having a shape suitable for grasping, a light emitting diode 12 and a collector. An irradiating section including an optical cylindrical lens 13 and the like, and a reading section including an optical path refracting mirror 14 for reading an image of a bar code, an optical lens 15, a CCD (charge coupled device) 16 and the like are provided. In addition, a bar code reader of the type in which a transparent plastic dust-proof cover 18 is fitted and fixed in the light projecting / receiving opening 17 opened at the tip of the case 11 is adopted as an applicable object.

As a special configuration of the present invention with respect to the above model, a lens-attached dustproof cover is formed by integrally molding the condensing cylindrical lens 13 on the surface of the dustproof cover 18 near the lower edge. Make up eighteen.

In addition, since the dust-proof cover 18 made of plastic is apt to have dust attached to its surface due to electrification, in order to prevent this, a transparent conductive film 19 is vacuumed on the outer surface of the dust-proof cover 18. It is desirable to coat by the vapor deposition method, and it is also useful for mechanical protection of the dust-proof cover surface.

[0011]

[Effect of the device]

 As described above, according to the present invention, the lens-attached dustproof cover, which is formed by integrally molding the cylindrical lens on the transparent plastic plate, is attached to the light emitting / receiving opening of the case. As a result, not only is the structure simple and the equipment can be downsized, but the loss of transmitted light is greatly reduced compared to the conventional technology in which a lens and a dustproof cover are provided separately. There is an effect that the optical path length can be shortened and a bar code image can be irradiated under high illuminance.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view illustrating a hand scanner type bar code reader according to the present invention.

FIG. 2 is a partially cutaway perspective view of only the dustproof cover in the hand scanner type bar corder of the present invention.

FIG. 3 is a vertical sectional side view illustrating a conventional hand scanner type bar code reader.

[Explanation of symbols]

 11 Case 12 Light emitting diode 13 Cylindrical lens for condensing 15 Optical lens 16 CCD 17 Light emitting / receiving aperture 18 Dust cover

Claims (1)

[Scope of utility model registration request] 1. A bar code image is irradiated while the irradiation light of a light emitting diode is condensed by a condensing cylindrical lens in a case suitable for grasping. , A bar code reader of the hand scanner type in which the image of the bar code is read by a reading section composed of an optical lens and a CCD or the like, for projecting and receiving light at the tip of the case. A hand scanner type bar code reader, characterized in that a dustproof cover with a condensing lens integrally formed with a cylindrical lens on a transparent plastic plate is attached to the opening.