JPH043573A - Handy image scanner - Google Patents

Abstract

PURPOSE:To fetch a picture with high quality by supporting both ends of a mirror regulating a light path with a chassis and varying a screwed position with respect to the chassis of plural adjustment screws fitted to the chassis. CONSTITUTION:An effective irradiating width 28a on an original 28 irradiated with a light source 27 having an illuminance required for an image sensor 22 is collected by utilizing a lens or the like to obtain a high illuminance and the effective width 28a is limited. In order integrate an optical axis of an optical path 29 in the limited and effective width 28a, adjustment screws 33a-33c fitted to a chassis 32 are turned in the tightening direction with respect to the chassis 32 to vary the screwed position. Thus, a tilt angle of mirrors 24-26 is optionally adjusted. Thus, the optical path is adjusted to fetch a picture with high quality.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an optical path adjustment device in a handy image scanner device.

[Prior Art] Fig. 5 is a perspective view showing the external appearance of a handy image scanner device using a conventional reduction optical system, and Fig. 6 is a sectional view showing the internal configuration of the handy image scanner device shown in Fig. 5. , and FIG. 7 is a perspective view showing the mirror mounting portion of the handy image scanner device of FIG. 5. In the figure,
1 is a handy image scanner device, 2 is a document, 2a
3 is a casing of the handy image scanner device 1; 4 is a one-dimensional image sensor; 5 is a reduction lens; 6. 7. 8 is a mirror 9 is an LED (
10. 11 is a roller for moving the handy image scanner device 1; 12 is each mirror 6; 7. This is the chassis to which 8 is fixed.

Next, the operation of the above-mentioned conventional handy image scanner device will be explained. A handy image scanner device 1 is manually moved over a document 2 by rollers 10 and 11. As the handy image scanner device 1 moves, the image of the reading portion 2a on the document 2 illuminated by the light source 9 is transferred to each mirror 6, 7. 8 to the reduction lens 5 and imaged on the image sensor 4. Here, the image of the read portion 2a is photoelectrically converted by the image sensor 4, but a detailed explanation of the photoelectric conversion function will be omitted. In order to make the entire device into a small handheld type, the handy image scanner device l has a housing 3.
A plurality of mirrors 6, 7. 8 (three in this example) are used to form the folded optical path, thereby reducing the size of the entire device. Incidentally, as shown in FIG. 7, each mirror 6, 7. 8 is
Both ends of each are fixed to the chassis 12 with an adhesive such as a pressure sensitive adhesive.

[Problems to be Solved by the Invention] Since the above-described conventional handy image scanner device is configured as described above, a plurality of mirrors 6 are used to form the optical path inside the housing 3 into a folded optical path. ,
7. 8 must be used, so each mirror 6, 7. It is necessary to appropriately set the position where the light source 8 is placed to achieve high positioning accuracy, and when such high positioning accuracy cannot be achieved, the optical axis of the optical path deviates from the irradiation width on the document 2 by the light source 9. As a result, there are problems in that the irradiated light from the light source 9 does not reach the image sensor 4 and the quality of the image deteriorates, or the image sensor 4 is unable to capture an image at all.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a handy image scanner device that can capture high-quality images by adjusting the optical path.

[Means for Solving the Problems] In the handy image scanner device according to the present invention, both ends of a mirror that adjusts the optical path are held by a chassis, and a plurality of adjusting screws attached to the chassis are connected to the chassis. It is equipped with a mirror adjustment mechanism that can arbitrarily adjust the inclination angle of the mirror by changing the screwing position.

[Function] The handy image scanner device of this invention has the following features:
By providing the mirror adjustment mechanism, the inclination angle of the mirror can be arbitrarily adjusted, thereby making it possible to form a folded optical path inside the casing with high precision.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
2 is a sectional view showing the internal structure of a handy image scanner device according to an embodiment of the present invention, FIG. 2 is a perspective view showing the mirror mounting portion of the handy image scanner device of FIG. 4(a) and 4(b) are explanatory diagrams showing adjustment of the inclination angle of the mirror in the mirror mounting section of the handy image scanner device of FIG. 1. In the figure, 21 is a housing of a handy image scanner device, 22 is a one-dimensional image sensor, 23 is a reduction lens, 24, 25, 26 are mirrors, 27 is L E D,
A light source such as a small fluorescent lamp, 28 is an original, 28a is an irradiation width irradiated by the light source 27 above the original, and 29 is an optical path. Further, 32 is a chassis that holds both ends of each mirror 24, 25, 26, 33 a, 33 b, 33
C is an adjustment screw for arbitrarily adjusting the inclination angle of each mirror 24, 25° 26, and each adjustment screw 33a, 3
3b and 33c are attached to the chassis 32 by screwing. 34 is each mirror 24, 25 .
26 is a spring that is elastically pressed against a surface opposite to the surface that contacts the chassis 32; 34a is a spring 34;
This is the protrusion at the tip of the.

Next, the operation of the handy image scanner device according to the embodiment of the present invention will be explained.

An optical path 29 in the irradiation width 28a on the original 28 illuminated by the light source 27 shown in FIG.
25 and 26, and is focused on the light receiving surface of the image sensor 22 through the reduction lens 23. Here, if the inclination angle of the mirror 24 is changed, for example, the reading portion on the original 28 moves, and the optical path 29 changes from the solid line shown in FIG. 1 to the position shown by the broken line. The effective irradiation width 28a on the document 28 irradiated by the light source 27 with the illumination intensity required by the image sensor 22 is the irradiation width 28a, which is usually focused using a lens or the like to obtain high illuminance. 28a(
xi direct) is limited. Therefore, in order to include the optical axis of the optical path 29 within this limited effective irradiation width 28a, the third
When the adjustment screw 33a is turned in the screwing direction as shown in the figure, each mirror 24, 25, 26 moves from the solid line shown in FIG. 3 to the position shown by the broken line, and is in an inclined state. Similarly, when the adjustment screw 33b is turned in the screwing direction,
Each of the mirrors 24, 25, 26 moves to a position in the opposite direction to that described above and becomes tilted.

Now, taking the mirror 24 as an example, adjustment of its inclination angle will be explained. As shown in FIG. 2, one side of both ends of the mirror 24 is in contact with the chassis 32, and the other side is pressed down by the elastic force of a spring 34, so that the mirror 24 is held by the chassis 32. become. In addition, the chassis 32 has adjustment screws 33 a, 3
3b and 33c are attached by screwing. In this case, the mirror 24 held by the chassis 32 is in the position shown by the solid line in FIG. 3. The state of the mirror 24 at this time is also clearly shown in the explanatory diagram shown in FIG. 4(a). Therefore, as shown in FIG. 3, for example, when the adjusting screw 33a is rotated in the direction of screwing in, the upper end of one side of the mirror 24 that comes into contact with the chassis 32 is pressed.
At the same time, the spring 34 pressed against the opposite surface is bent, so that the mirror 24 moves from the solid line to the position shown by the broken line in FIG. 3 and tilts. The tilted state of the mirror 24 at this time is also clearly shown in the explanatory diagram shown in FIG. 4(b). Similarly, when the adjustment screw 33b is rotated in the screwing direction, the mirror 240
will be tilted in the opposite direction to the above case.

Therefore, in the mirror adjustment mechanism according to the present invention as described above, each adjustment screw 33 a, 33 b, 33 c, which is screwed onto the chassis 32, is rotated in the direction of screwing into the chassis 32. By changing the alignment position, the inclination angle of each mirror 24, 25, 26 can be arbitrarily adjusted.

Note that each adjustment screw 33a in the above embodiment.

Hexagon socket set screws may be used as 33 b and 33 c.

[Effects of the Invention] As described above, according to the handy image scanner device of the present invention, both ends of the mirror that adjusts the optical path are held by the chassis, and the plural adjustment screws attached to the chassis are The structure is equipped with a mirror adjustment mechanism that can arbitrarily adjust the inclination angle of the mirror by changing its screwing position with respect to the chassis, which improves the positioning accuracy of the mirror, which is an optical component, and allows for the optimal optical path. It becomes possible to ensure the setting of the optical axis, and this has the excellent effect of providing a handy image scanner device that can take in high-quality images.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing the internal structure of a handy image scanner device according to an embodiment of the present invention, FIG. 2 is a perspective view showing the mirror mounting portion of the handy image scanner device shown in FIG. 1, and FIG. 4(a) and 4(b) are explanatory diagrams showing the adjustment of the mirror inclination angle in the mirror mounting section of the handy image scanner device of FIG. 1, and FIG. FIG. 6 is a perspective view showing the external appearance of the handy image scanner device used; FIG. 6 is a sectional view showing the internal configuration of the handy image scanner device shown in FIG. 5;
FIG. 7 is a perspective view showing the mirror mounting portion of the handy image scanner device of FIG. 5. FIG. In the figure, 1... Handy image scanner device, 2. 2... Original, 2a... Reading part, 3
゜21... Housing, 4, 22... Image sensor, 5
, 23... reduction lens, 6. 7. 8. 24.
25. 26... Mirror 9, 27... Light source, 1
0.11...Roller, 12.32...Chassis, 2
8a... Irradiation width, 29... Optical path, 33a, 33b,
33cm - Adjustment screw, 34... Spring, 34
a...Protrusion. In addition, the same symbols in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] A handy image scanner device using a reduced optical system is provided with a chassis that holds both ends of a mirror that adjusts the optical path, and a plurality of adjustment screws attached to this chassis. A handy image scanner device comprising: a mirror adjustment mechanism that arbitrarily adjusts the inclination angle of the mirror in accordance with the screwing position of the mirror with respect to the chassis.