CN1494310A - Light collecting device of scanner - Google Patents

Abstract

A Light collecting device (Light collecting Apparatus) of scanner is disclosed, which separates the Light source module of the Light collecting device from the scanning module, fixes the Light source module in the scanner body, and then guides the Light source to the scanning line of the original by using the Light collecting component and the Light guiding component. The light source module is independent of the scanning module, so that the miniaturization design of the scanner is facilitated, the heat dissipation is easy, and the noise or deformation caused by heating of a Charge Coupled Device (CCD), a reflecting mirror or a scanning module main body is reduced.

Description

Scanner Light Collector

technical field

The present invention relates to a scanner light gathering device (Light Gathering Apparatus), in particular to a scanner light gathering device which separates a light source module from a scanning module.

Background technique

At present, the scanning light source of the scanner is generally installed on the scanning module in the main body of the scanner, and cold cathode tubes are mostly used as the scanning light source. Please refer to FIG. 1 , which is a schematic cross-sectional view of a conventional scanner device. A general scanner 100 is mainly composed of a main body 102 . The main body 102 includes a scanning module 104 , and the scanning module 104 is equipped with a scanning light source 106 and a light-collecting reflection sheet 108 below the light source 106 . The document 110 to be scanned is placed on the document surface 114 of the main body 102 .

When scanning the original 110 , the light source 106 emits light 112 , part of the light 112 directly strikes the original 110 , and the other part of the light 112 is collected by the light-collecting reflection sheet 108 below the light source 106 and then reflected onto the original 110 . At this time, the scanning module 104 moves in a direction 118 inside the main body 102 so that the light 112 emitted by the light source 106 scans the entire document 110 . After the light 112 scans the entire document 110 , the scanning module 104 travels in a direction 116 and returns to the pre-scanning position. After the light 112 irradiated on the document 110 is reflected, the generated image is reflected and enters the scanning module 104 , and then processed by the scanning module 104 to form a digital image signal to complete the scanning.

However, in the pursuit of lighter, thinner and shorter scanner components, the space available for disposing light-collecting components on the scanning module is getting smaller and smaller. Since the light source module of the light-collecting device is arranged on the scanning module, the light-collecting area is reduced , resulting in a decrease in the efficiency of the light source.

In addition, the arrangement of the light source module on the scanning module will cause noise or deformation of the charge-coupled device, reflector, or scanning module due to heat.

Contents of the invention

Aiming at the deficiencies of the above-mentioned prior art, the main purpose of the present invention is to provide a scanner light collecting device, which separates the light source module from the scanning module and fixes it in the main body of the scanner. The light is guided onto the scanning line on the original surface. Therefore, in addition to using a large-area light-collecting reflection sheet to improve the efficiency of the light source, it is more conducive to the heat dissipation of the scanner.

Another object of the present invention is to provide a light-collecting device for a scanner. By separating the light source module from the scanning module, it is possible to avoid noise or deformation of the charge-coupled component, reflective mirror, or scanning module body due to heat, and thus can Improve image quality.

Another object of the present invention is to provide a scanner light collection device in which the light source module is independent of the scanning module. By adjusting the position of the light guide mirror in the main body, the light source can enter the reflective mirror of the upper cover and be reflected onto the light guide plate. Perform a penetrating scan. Therefore, it not only has the function of reflective scanning, but also has the function of penetrating scanning.

In order to achieve the above object, the present invention provides a scanner light-collecting device fixed at one end of a main body of the scanner, wherein the scanner also at least includes a document surface located on the main body, and a scanning module movable in the main body , and an upper cover located on the original surface, and the light collecting device of the scanner at least includes: a light source for emitting a plurality of light rays; a light collecting reflective sheet for gathering the light into a parallel beam and emitting it; and A light guiding device is used to guide the parallel light beams reflected by the above-mentioned light-collecting reflection sheet to the original document surface.

Wherein, the above-mentioned scanning module includes at least a first reflective mirror, and the light guide device includes at least a second reflective mirror located above the light-collecting reflective sheet, and the second reflective mirror is movable, when the second reflective When a reflective surface of the lens is located on the path of the parallel beam reflected by the light-collecting reflector, the second reflector is used to reflect the parallel beam. In addition, the light guiding device at least includes a lens group, which is used to narrow the scope of the parallel light beam emitted from the second reflective mirror, and make the parallel light beam incident to the first reflective mirror and then to the document surface for reflective scanning.

In addition, the light guide device also includes a third reflective mirror located in the upper cover, and the upper cover also has a light guide plate, and when the above-mentioned second reflective mirror is parallel to the parallel light beam emitted by the light collecting reflective sheet, the After the parallel light beam hits the third reflecting mirror, it is reflected into the light guide plate, and then hits the original document surface for penetrating scanning.

Since the light source module of the light collection device is fixed in the main body of the scanner, a large-area light collection reflector can be used to achieve the purpose of improving the use efficiency of the light source. In addition, by adjusting the movable second reflective mirror, the scanner can have the functions of reflective scanning and penetrating scanning.

Brief description of the drawings

In order to further understand the technical means and effects of the present invention to achieve the intended purpose, please refer to the following detailed description and accompanying drawings of specific embodiments of the present invention, but the attached drawings are only for reference and description, not for to limit the present invention.

In the attached picture,

FIG. 1 is a schematic cross-sectional view of an existing scanner device;

2 is a schematic diagram of a reflective scanning device of the scanner of the present invention; and

FIG. 3 is a schematic diagram of a penetrating scanning device of the scanner of the present invention.

Detailed ways

The invention discloses a light collecting device of a scanner, which removes the light source module of the light collecting device from the scanning module and fixes it in the main body of the scanner. In this way, the use space of the light collecting assembly can be increased to achieve The purpose of improving the efficiency of the light source. In order to make the description of the present invention more detailed and complete, refer to the following description in conjunction with FIG. 2 and FIG. 3 .

Please refer to FIG. 2 , which is a schematic diagram of a reflective scanning device for a scanner implementing the present invention. The scanner 200 is mainly composed of a main body 202 and an upper cover 228 , wherein the main body 202 includes at least a scanning module 204 movable inside the main body 202 and a light source module fixed at one end inside the main body 202 . The scanning module 204 further includes at least a reflective mirror 222 and a receiving hole 224 for receiving a reflected image generated during scanning. The light source module at least includes a light source 206, a light-collecting reflection sheet 208 positioned below the light source 206, a reflective mirror 214 positioned above the light source 206, and a lens group 220 composed of a convex lens 216 and a concave lens 218, wherein the light-collecting reflection sheet 208 can be a concave surface. mirror. The lens group 220 is located between the reflective lens 214 and the reflective lens 222 , and the reflective lens 214 is movable, for example, its position can be adjusted by rotating. The document 226 to be scanned is placed on the document surface 234 of the main body 202 between the main body 202 and the upper cover 228 . The upper cover 228 at least includes a reflective lens 230 and a light guide plate 232 .

Wherein, the above-mentioned reflecting mirror 222 and the light source module constitute the light collection device of the present invention. The light source module includes a light source 206 , a light-collecting reflection sheet 208 , a reflection sheet 214 , and a lens group 220 .

When scanning the document 226 , the light source 206 emits light 210 , and the light 210 is collected by the light-collecting reflective sheet 208 to form a parallel beam 212 and strike the reflective sheet 214 . When the reflective surface of the reflective mirror 214 is located on the path of the parallel light beam 212, as shown in Figure 2, the reflective mirror 214 reflects the parallel light beam 212 to the lens group 220, so that the parallel light beam 212 passes through the convex lens 216 and the concave lens 218 successively, and the parallel light beam 212 The range of the light beam 212 is reduced. The parallel light beam 212 passing through the lens group 220 hits the reflective mirror 222 on the scanning module 204, and is reflected on the original 226 to form a scanned image that enters the receiving hole 224 of the scanning module 204, and then passes through the optical path in the scanning module 204. The device, lens, and Charged Coupled Device (CCD) complete the imaging. Reflective scanning of the entire document 226 is accomplished as the scanning module 204 moves in the direction 236 . After the entire document 226 has been scanned, the scanning module moves in direction 238 back to the standby position. In this preferred embodiment, the reflective lens 222 is a flat mirror, and the reflective lens 222 of the present invention can also be a concave mirror with light-gathering function.

Please refer to FIG. 3 , which is a schematic diagram of a scanner implementing the present invention for penetrating scanning. When the reflective surface of the reflective lens 214 is parallel to the parallel light beam 212 , as shown in FIG. 3 , the parallel light beam 212 emitted from the light-collecting reflective plate 208 passes through the main body 202 and strikes the reflective lens 230 inside the upper cover 228 . After being reflected by the mirror 230 , the parallel light beam 212 first enters the light guide plate 232 , and then passes through the upper cover 228 to the original document 226 . After passing through the original document 226 and the original document surface 234 , a scanned image is formed. At this moment, the scanning module 204 moves toward the direction 236 , so that the formed scanning image enters the receiving hole 224 , so as to complete the imaging by the optical path device, the lens, and the charge-coupled device in the scanning module 204 . As the scanning module 204 moves in the direction 236 , the transmissive scanning of the entire document 226 is completed. After the entire document 226 has been scanned, the scanning module moves in direction 238 back to the standby position.

To sum up, one advantage of the present invention is that the light source module of the light collecting device of the scanner is independent of the scanning module and fixed at one end of the scanner main body. Therefore, a large-area light-collecting reflector can be used to achieve the purpose of improving the efficiency of the light source, and it is also beneficial to the heat dissipation of the scanner.

Another advantage of the present invention is that the light source module is fixed in the main body of the scanner, rather than on the scanning module, so that noise or deformation of the charge-coupled components, reflectors, or scanning module main body in the scanning module can be avoided due to heating, and further Get high-quality scanned images.

Another advantage of the present invention is that the penetrating scanning can be performed by adjusting the position of the light guide lens located in the light source module in the main body of the scanner so that the light beam enters the reflection lens in the upper cover. Therefore, the scanner light collecting device of the present invention has the functions of reflective scanning and penetrating scanning.

As understood by those familiar with this technical field, the above description is only a preferred embodiment of the present invention, and is not intended to limit the claims of the present invention; all equivalents accomplished under the concept disclosed in the present invention Changes or modifications should be included in the described claims.

Claims (9)

1. The light collecting device of the scanner is fixed at one end of a main body of the scanner, wherein the scanner at least includes a manuscript surface on the main body and a scanning module movable in the main body, and the scanner Light collecting devices include at least: a light source for emitting a number of rays; a light-collecting reflector for concentrating these rays into a parallel beam for emission; and A light guiding device is used to guide the parallel light beam reflected by the light-collecting reflective sheet to the original document surface. 2. The light collecting device of a scanner according to claim 1, wherein the light collecting reflective sheet is a concave mirror. 3. The light collecting device for a scanner as claimed in claim 1, wherein the scanning module further comprises at least a first reflective mirror. 4. The light collecting device of a scanner as claimed in claim 3, wherein the first reflecting mirror is a plane mirror. 5. The light collecting device of a scanner as claimed in claim 3, wherein the first reflective mirror is a concave mirror. 6. The scanner light collecting device as claimed in claim 3, wherein the light guiding device at least comprises: a second reflective mirror located above the light-collecting reflective sheet in the main body, and the second reflective mirror is movable; and A lens group, located in the main body, is used to reduce the range of the parallel light beam, wherein, when a reflective surface of the second reflective lens is located on the path of the parallel light beam emitted by the light-collecting reflective sheet, the parallel light beam passes through the first The reflective surfaces of the two reflective mirrors reflect and enter the lens group, and then project to the first reflective mirror, and then reflect to the original surface through the first reflective mirror. 7. The light collecting device of a scanner according to claim 6, wherein the scanner further comprises at least one upper cover on the original document. 8. The light collecting device of a scanner as claimed in claim 7, wherein the light guide device further comprises at least a third reflective lens located in the upper cover, and the upper cover further comprises at least a light guide plate, when the first When the reflection surface of the second reflective lens is parallel to the parallel light beam, the parallel light beam shoots to the third reflective lens in the upper cover, and after being reflected by the third reflective lens, the parallel light beam enters the light guide plate and then enters the Original side. 9. The light collecting device of a scanner as claimed in claim 6, wherein the lens group at least comprises a convex lens and a concave lens.

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