JPH089970Y2 - Image information input device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an image information input device, and more particularly to an image information input device less affected by ambient light.

[Conventional technology]

Image scanners, bar code readers, and the like are generally known as image information input devices that input image information, convert it into electric signals, and then supply it to image processing devices such as personal computers and word processors.

FIGS. 3 and 4 show a conventional image information input device of this type. FIG. 3 is a cross-sectional view showing a conventional image information input device, and FIG. 4 is an enlarged cross-sectional view of an essential part seen from above.
In the figure, 1 is a case having a substantially rectangular parallelepiped flat shape and an opening 1a is formed on the bottom surface, 2 is a light emitting portion including a light emitting diode or the like for irradiating light to the information medium 4 through the opening 1a, 3 Is the information light including the image information reflected on the information medium 4 by the light emitted from the light emitting portion 2 to the information medium 4, and again reflects the information light entering the case 1 through the opening 1a toward the image sensor 5. The mirrors 6a and 6b are arranged one pair behind the opening 1a and in the vicinity of the image sensor 5 so as to be spaced apart from each other, and a roller slightly protruding from the bottom surface of the case 1 so as to come into contact with the information medium 10; A dustproof cover made of a transparent acrylic resin attached to the opening 1a of the lens, 8 is a lens for focusing the information light on the image sensor 5, 9 is a cylindrical lens holder in which the lens is installed,
Reference numeral 10 denotes an Ω-shaped fixing member that fixes the lens holder 9 to the case 1, 11 denotes a sensor holder having a shape covering the image sensor 5, and having an opening 11a in front of the image sensor 5, 12 denotes the image sensor 5. A board 13 to be attached is a screw for fixing the board 12 and the sensor holder 11 to the case 1. Further, the opening 11 of the lens holder 9 and the sensor holder 11
A slight gap is provided between the a and the a to facilitate the assembly work and the focus adjustment of the lens.

[Problems to be solved by the device]

As described above, in the conventional image information input device, since there is a slight gap between the lens holder 9 and the opening 11a of the sensor holder 11, ambient light enters the sensor holder 11 through the gap and the edge of the image is white. However, there was a problem in that accurate reading could not be performed.

[Means for solving the problem]

In order to solve the above-mentioned problems, information light having image information is made incident by scanning on an information medium, and the information light is guided through a lens to an image sensor covered with a holder, and image data is obtained from the information light. In the image information input device for reading, the holder is integrally formed with a diaphragm section for blocking unnecessary light between the lens and the image sensor, and an inclination angle inclined from the lens side is provided at an end of the diaphragm section. An image information input device characterized by the above.

[Action]

In the image information input device having the above configuration, by providing the protrusion in the opening of the sensor holder, accurate reading can be performed without being affected by ambient light, and the reading area of the sensor can be increased.

〔Example〕

Next, an embodiment of the image information input device according to the present invention will be described. 1 and 2 are a cross-sectional view showing an embodiment of an image information input device according to the present invention and an enlarged cross-sectional view of an essential part seen from above. In the figure, the same components as those in FIGS. 3 and 4 are designated by the same reference numerals, and the description thereof will be omitted. In FIGS. 1 and 2, reference numeral 11b denotes a protruding portion (throttle portion) which protrudes inward of the opening 11a of the sensor holder 11 and is formed integrally with the sensor holder 11. Here, the opening 11
The diameter dimension A of a is formed to be smaller than the diameter dimension B of the lens holder 9, which allows disturbance light to enter the gap between the lens holder 9 and the sensor holder 11 during scanning of the image information input device. Even in this case, the projecting portion 11b prevents the disturbance light from being blocked and adversely affects the image sensor 5, and the problem that the edge portion of the image becomes white is solved, and accurate reading can be performed. Also, the protrusion
An inclination angle θ that is inclined from the lens side is provided at the end of 11b. This is to allow the information light passing through the lens to have a large area read by the image sensor 5. Is provided so as to be determined by the image of the lens holder 9 or the like.

[Effect of device]

As described above, the image information input device according to the present invention includes the lens holder 9 and the sensor holder during scanning of the image information input device.
Even if ambient light enters the gap between 11, the ambient light is blocked by the protrusion 11b and does not adversely affect the image sensor 5. Therefore, the problem that the edge of the image becomes white is solved and accurate reading is performed. In addition, the inclination angle inclined from the lens side provided at the end of the diaphragm section brings about an effect that the reading area of the image sensor 5 can be made large.

[Brief description of drawings]

1 and 2 are views showing an embodiment of an image information input device according to the present invention. FIG. 1 is a sectional view, FIG. 2 is an enlarged sectional view of an essential part seen from above, FIG. 3 and FIG. FIG. 4 is a view showing a conventional image information input device, FIG. 3 is a cross-sectional view, and FIG. 4 is an enlarged cross-sectional view of an essential part viewed from above. 1 ... Case, 2 ... Light emitting part, 3 ... Mirror, 4 ... Information medium, 5 ... Image sensor, 6a, 6b ... Roller, 7
...... Dustproof cover, 8 ... Lens, 9 ... Lens holder,
10 ... Fixing member, 11 ... Sensor holder, 11a ... Opening, 11b ... Projection (diaphragm), 12 ... Substrate.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location G06F 15/64 320 P

Claims (1)

[Scope of utility model registration request] 1. An image in which information light having image information is incident by scanning the information medium, guides the information light through a lens to an image sensor covered by a holder, and reads image data from the information light. In the information input device, a diaphragm portion that projects inwardly of the opening of the holder and blocks unnecessary light between the lens and the image sensor is integrally formed with the holder, and the end portion of the diaphragm portion is inclined from the lens side. An image information input device characterized in that a tilt angle is provided.