CN2282695Y - Light source device for reading projected images - Google Patents

Abstract

A light source device for reading projected image features that at least two or more lamps are alternatively arranged at both sides of the area to be read and the reflected light, and the light projected by at least two lamps can cover the length range of the area to be read, so the light with smaller diameter and shorter length can be used to project the large-size image in reader.

Description

Light source device for reading projected images

The utility model relates to a light source device for reading projected images, in particular to a light source device for reading projected images with small volume and capable of reading large-size images.

The light sources used by projection image reading devices on the market include LED, halogen lamps, tungsten lamps, fluorescent lamps and cold cathode fluorescent lamps. Generally, they are based on the light source intensity, service life, price and reading requirements of the projection image reading device. Length and other factors to choose the appropriate light source. For example, when the projection reading device uses a line projection image sensor (Line ccd), most of them use fluorescent lamps or cold-cathode fluorescent lamps as light sources. Dimensions vary. For example, fluorescent lamps have specifications of 4W, 6W, 8W, 10W, 20W, and 40W, providing lighting with different tube diameters and lengths; cold cathode fluorescent lamps can be made into tubes of different lengths according to the size of the required lighting. . However, if the size of the projected image to be read is relatively large (such as A2, A1, A0, etc.), the eyelight is generally used to provide sufficient projection light.

Figures 7 and 8 show the installation diagrams generally used as light sources for projection image reading devices. The lighting length of the lamp tube 1 must cover the length of the area to be read 3, so that the luminosity of the area to be read can be consistent, and the image of the area to be read can be completely reflected into the reading device. However, since the lamp tube is made of glass, considering the strength of the material, the longer the lamp tube length, the larger the required tube diameter. Therefore, when the size of the projected image to be read is large, the lamp tube 1 Due to the increase in length, the tube diameter also increases, so that a large space is required to accommodate the lamp tube 1 on the overall device, so that the overall device cannot be miniaturized.

The purpose of the utility model is to provide a lamp tube with a smaller tube diameter and a shorter length as a light source device for reading a projected image with a large size.

Another object of the present invention is to provide a light source device for reading a projected image, which can reduce the overall size of the projected image reading device.

The utility model is realized in the following way: it includes a lamp tube and a socket, and it is characterized in that: there are at least two of the above-mentioned lamp tubes, which are staggeredly arranged on both sides of the above-mentioned reflective line at an appropriate distance from the above-mentioned reflective line, and Extend horizontally from the middle of the read area to both sides in the length direction of the read area, so that the projected light covers the entire length of the read area; there are at least two lamp holders, with Corresponding to the number of the above two or more lamp tubes, it is used to support these lamp tubes, so that the light from the above at least two or more lamp tubes can be projected on the reading area.

The above-mentioned at least two or more sockets are respectively protruded with a plate body for respectively fixing the at least two or more lamp tubes.

The board is provided with a number of adjustment holes that can be used to adjust the light of the at least two or more lamp tubes to project on the position of the area to be read, so that the at least two or more lamp tubes are projected on the position of the area to be read. The light is continuous and the illuminance is consistent.

The several adjustment holes in the tool may be elongated holes extending parallel to the length direction of the read area.

Wherein the at least two or more sockets can respectively support two ends of the two or more lamp tubes.

Wherein the two or more sockets can be hollow strip-shaped sockets, which are used to hold the two or more lamp tubes, and a gap is respectively recessed in the direction toward the read area, so that the two or more The light of the lamp can be projected on the area to be read.

Wherein the hollow parts of the two or more sockets can be provided with reflective sheets to enhance projected light.

The utility model is characterized in that at least two or more lamp tubes are alternately arranged on both sides of the area to be read and the reflection line, and the at least two or more lamp tubes are used to project light rays to connect each other, so that the at least two or more lamp tubes The light projected by the lamp tube can cover the length range of the area to be read, so that the lamp tube with a small diameter and short length can be used to project a large-size image completely in the reader without Limited by the length of the read region.

Fig. 1 is a structural schematic diagram of the projected image reading device constituted by the utility model, which is used to reveal the relationship between the light source device of the utility model and the overall device.

Fig. 2 is a structural schematic diagram of another projected image reading device constituted by the present invention, which is used to reveal the relationship position between the light source device and the overall device of another reading device of the present invention without mirror group.

FIG. 3 is a schematic diagram of the installation of the present invention, which is used to reveal the relationship between the light source device of the present invention and the area to be read.

Fig. 4 is a sectional view taken along the A-A line of Fig. 2;

Fig. 5 is a sectional view taken along the B-B line of Fig. 2;

Fig. 6 is a schematic diagram of yet another specific embodiment of the utility model;

Fig. 7 is a schematic diagram of a light source setting of a currently used projection image reading device;

Fig. 8 is a sectional view taken along the line P-P of Fig. 5;

Referring to each figure, the utility model mainly separates the light source devices 10 required by the object to be read 30 in a staggered manner, and utilizes the interconnection of the light projected by the light source devices 10 arranged in a staggered manner to make the area to be read on the object 30 to be read The image of 31 is completely reflected on the mirror group 40 along the reflection line 41 between the area to be read 31 and the mirror group 40, and then the image is reflected to the lens 60 through the mirror group 40 for the reader 50 to read. Take, or directly reflect the image of the area 31 to be read completely along the reflection line 41 to the lens 60 for the reader to read.

1-3, the light source device 10 is composed of at least two lamp tubes 11, 12, wherein the lamp tube 11 and the reflective line 41 are arranged on one side of the reflective line 41 at a certain distance, and are read by the Take the middle part of the length of the area 31 and extend horizontally to one end of the length direction of the area 31 to be read, while the lamp tube 12 is set on the other side of the reflection line 41 at a certain distance from the reflection line 41, and along the length of the area 31 to be read The middle position extends horizontally to the other end of the length of the read area 31 (when the two or more lamp tubes are arranged in two, they extend from the near middle of the read area to both ends, and when three lamp tubes are arranged in this way, then In order to extend from the length of the area to be read to nearly 1/3 alternately to both ends...), so that the light rays projected by the lamp tube 11 and the lamp tube 12 on the area to be read 31 can cover the area to be read in a cohesive manner 31 , and the images along the length of the read area 31 are reflected to the mirror 30 along the reflection line 41 . In order to make the quality of projected image reading good, at least two sockets 21, 22 corresponding to the number of lamp tubes 11, 12 can also be arranged on the lamp tubes 11, 12, so that the light projected by the lamp tubes 11, 12 can be properly Adjust to a good articulation position.

Referring to Fig. 3, Fig. 4 and Fig. 5, the holders 21, 22 are in the form of hollow strips with a hollow portion 214, 224 respectively, and are respectively used for horizontally accommodating the lamp tubes 11, 12 in the hollow portions 214, 224 , and the two ends of the hollow parts 214, 224 are respectively provided with an end supporting part 215, 225, so that the lamp tubes 11, 12 can be firmly fixed on the sockets 21, 22 respectively, and at the same time, the sockets 21, 22 are respectively A notch 211, 221 is recessed, and the notch 211, 221 extends horizontally from one end of the lamp tube 11, 12 to the other end of the lamp tube 11, 12 along the length direction in the manner of facing upward to the read area 31, so that the lamp The projection light of the tubes 11 , 12 can be projected on the area 31 to be read through the gaps 211 , 221 . In order to make the other ends of the lamp tubes 11, 12 enhance the projected light of the lamp tubes 11, 12, a reflective sheet 216, 226 can also be arranged on the hollow parts 214, 224 to enhance the reading quality.

A board body 212, 222 protrudes from the end surfaces of the bearing seats 21, 22 respectively, wherein the board body 212 is arranged in a manner extending along the length direction of the bearing seat 21, and a plurality of adjustment holes 213 are provided on the board body 212, These adjustment holes 213 can be elongated holes extending parallel to each other in the length direction of the area to be read 31, used to fix the seat 21 and the lamp tube 11, and allow the seat 21 to move appropriately (the length direction and the left and right can be properly moved) Move) to obtain the adjustment of the light projection position of the lamp tube 11, while the plate body 222 is arranged in a manner extending along the length direction of the seat 22. The adjustment holes 223 parallel to and extending along the length direction of the socket 22 are used to fix the socket 22 and the lamp tube 12 , and allow the socket 22 to be adjusted and moved so as to adjust the projected light position of the lamp tube 12 . Because the positions of the holders 21 and 22 can be moved and adjusted relative to each other, the illuminance at the junction of the light rays projected by the interlaced lamp tubes 11 and 12 on the area 31 to be read can be consistent, so as to obtain a good projection image reading quality.

Since the utility model adopts the light source device composed of at least two or more lamp tubes to be arranged alternately on both sides of the reflection line between the area to be read and the reflecting mirror group, the light projected by the at least two or more lamp tubes The continuous connection covers the length range of the area to be read, and the image of the area to be read is completely reflected to the reader through the mirror group, so as long as the lamp tubes with smaller diameter and shorter length are staggered, Large-sized images can be read without being limited by the length of the lamp tube, and the height space required for the use of a lamp tube with a large diameter can be saved, so that the overall volume of the reading device is reduced and miniaturized.

Referring to another embodiment shown in Fig. 6, two or more lamp tubes 11, 12 are respectively supported by sockets 21a, 22a supported at both ends of the lamp tubes, and the sockets 21a, 22a can be protruded from the two ends respectively. A plate body 212a, 222a is provided with adjusting holes 213a, 223a respectively on the plate body 212a, 222a, so that the two or more lamp tubes 11, 12 can also be used for adjusting, moving and fixing the light projection position.

Claims (7)

1. A light source device for reading projected images, which can project the image of the read area on the object to be read into the reading area along the reflection line of the read area, wherein the light source device includes a lamp tube and a socket , characterized in that: there are at least two of the above-mentioned lamp tubes, which are staggeredly arranged on both sides of the above-mentioned reflection line at a proper distance from the above-mentioned reflection line, and are respectively from the middle of the length of the above-mentioned read area to the read area. Both sides of the length direction of the area extend horizontally, so that the projection light covers the entire length range of the read area; there are at least two lamp holders, which are set in a manner corresponding to the number of the above two or more lamp tubes, for These lamp tubes are supported so that the light from at least two lamp tubes can be projected on the reading area. 2. The light source device for reading projected images according to claim 1, characterized in that: each of the at least two or more sockets is protruded with a plate for respectively fixing the at least two or more lamp tubes. 3. The light source device for reading projected images according to claim 2, characterized in that: the board is provided with a plurality of light tubes that can be used to adjust the light of the at least two or more lamps so that they are projected on the area to be read The position adjustment holes are for the purpose of making the light projected by the at least two or more lamp tubes on the area to be read continuous and consistent in illuminance. 4. The light source device for reading projected images according to claim 3, wherein the several adjustment holes are elongated holes extending parallel to the longitudinal direction of the area to be read. 5 . The light source device for reading projected images as claimed in claim 1 , wherein the at least two sockets support two ends of the two or more lamp tubes. 6. The light source device for reading projected images according to claim 1, wherein the two or more sockets can be hollow strip-shaped sockets for holding the two or more lamps tubes, and a notch is recessed in the direction towards the area to be read, so that the light from the two or more lamp tubes can be projected on the area to be read. 7. The light source device for reading projected images as claimed in claim 6, wherein the hollow parts of the two or more seats can be provided with reflective sheets.

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