JPS6239470Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a hand-held optical reading device.

[Technical background of the invention]

As shown in FIGS. 1 and 2, a plurality of lamps 5 are installed horizontally in a hollow main body 4 in which an opening 3 is formed in order to read a bar code 2 on a display surface, for example, a label 1. A plate 6, a lens 7, and a sensor 8 are built in, and the light from the lamp 5 is emitted from the aperture 3, the reflected light from the label 1 is refracted by the reflection plate 6, the light is collected by the lens 7, and the light is received by the sensor 8. There is one in which the contents of the barcode 2 are read and a light shielding plate 9 is provided to prevent the light from the lamp 5 from directly hitting the reflecting plate 6.

[Problems with background technology]

In the above-mentioned device, if the amount of light received is too large, the difference in brightness cannot be read, so the lamp 5 is positioned backward at an angle α with respect to the plane connecting the center P of the label 1 to be read and the reflector 6. There is. That is, the reflecting plate 6 is designed to receive the reflected light from the label 1 in an area where the amount of reflected light is small.

However, when the aperture 3 is close to the label 1 as shown in FIG. At that time, the light from lamp 5 deviates from P. In this state, the amount of light reflected from P toward the reflection plate 6 is too small to be readable. Furthermore, if the opening 3 is brought too close to the label 1, the heat of the lamp 5 will be difficult to escape and the temperature will rise.

[Purpose of invention]

This idea was developed in view of the above points, and it is a hand-held optical reading device that can reliably read the contents of the display screen even if the opening of the main body is moved a little away from the display surface, and also promotes heat dissipation. The purpose is to obtain the following.

[Summary of the idea]

This idea projects light from a light source installed in the main body onto the display screen through an opening formed at one end of the main body, and the light reflected from the display surface is received by a photoreceptor, in order to limit the amount of light to the photoreceptor. The light source is moved to the rear with respect to the straight line connecting the surface and the photoreceptor. Therefore, when the aperture of the main body is moved away from the display surface, the light is emitted to a position in front of the display surface to be read. By forming a continuous auxiliary aperture on the rear edge, the range of light emitted onto the display surface is expanded to ensure that the displayed content can be read, and the auxiliary aperture also promotes heat dissipation. be.

[Example of idea]

An embodiment of this invention will be explained based on FIGS. 3 and 4. Components that are the same as those described in FIGS. 1 and 2 are designated by the same reference numerals, and description thereof will be omitted. The hollow main body 10 has a grip 11 that is easy to grasp, and the tip of the grip 11 has an expanded portion 1 that expands flatly.
2, and the end of the expanded portion 12 is continuous with a bent portion 13 that is bent at an obtuse angle from the horizontal direction. The lens 7 and the sensor 8 are housed in the widened part 12, the reflector 6 is housed between the widened part 12 and the bent part 13 as a light receiver that receives reflected light from the label 1, and the light shielding plate 9 and the lamp 5 is housed in the bent portion 13. Thus, an auxiliary opening 14 is formed in the lower part of the bent portion 13 so as to be continuous with the rear edge of the opening 3.

In such a configuration, light from the lamp 5 is projected onto the label 1 through the aperture 3 and the auxiliary aperture 14. Therefore, even if the light projection range is wide and the aperture 3 of the main body 10 is raised as shown in FIG. , the amount of light necessary for reading is secured. Further, since the auxiliary opening 14 is formed on the rear upward slope 15, the main body 1
Even if the label 1 is brought into close contact with the label 1, the internal heat can be radiated through the auxiliary opening 14.

In this embodiment, the reflector 6 is used as a method for receiving the reflected light from the label 1, but instead of using the reflector 6, the main body 10 has a linear shape in which the grip 11 extends obliquely upward. You can also do this.

[Effect of idea]

Since this device is configured as described above, by forming the auxiliary aperture, the range of light projected onto the display surface can be expanded, and even if the main body is lifted from the display surface, the part to be read can be included in the light projection surface. Therefore, the contents on the display surface can be read reliably, and the auxiliary opening can also promote heat dissipation.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional example, Fig. 2 is a partially enlarged longitudinal sectional side view showing its internal structure, Fig. 3 is a perspective view showing an embodiment of this invention, and Fig. 4 is its interior. FIG. 2 is a partially enlarged vertical cross-sectional side view showing the structure. 1... Label (display surface), 3... Opening, 5...
Lamp (light source), 6...Reflector (photoreceptor), 9...
Light shielding plate, 10...Main body, 14...Auxiliary opening.

Claims (1)

[Scope of utility model registration request] An aperture for projecting and receiving light facing a display surface is formed at one end of a hollow main body containing a built-in photoreceptor, and a light source that emits light from this aperture toward the display surface is connected to the aperture and the photoreceptor. A light-shielding plate is provided in the main body so as to be located rearward from the connecting straight line, a light shielding plate is provided between the light source and the light receiving body, and an auxiliary aperture that opens toward the display surface in the main body is connected to a rear edge of the opening. A hand-held optical reading device characterized in that it is formed by: