JP3046699U - Scanner light path structure - Google Patents

Abstract

(57) [Summary] (with correction) [PROBLEMS] To provide a light path structure of a scanner using a contact-type image sensor which is small in volume, light in weight, and capable of clearly receiving an image of scan data. SOLUTION: A contact-type image sensor 141 is provided in a light beam structure, and the contact-type image sensor 141 is brought into close contact with and in contact with a lower part of a transparent glass layer, and is moved at a fixed distance along the bottom of the transparent glass layer. Thus, the scanning data on the transparent glass layer is positioned within the focal range of the contact type image sensor 141.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a new design of a light path structure of an optical scanning device, which employs a contact image sensor (CIS) in a scanner. In particular, utilizing the characteristics of the contact type image sensor that the light is short, the scanner's optical mechanical system is simplified, and the structure of the scanner is light, thin, small, and excellent, and the structure is simple, and packaging and maintenance are easy. According to.

[0002]

[Prior art]

 Known flat scanners employ a charge coupled device (CCD) as an optical scanning device.

[0003]

[Problems to be solved by the invention]

 However, the known flatbed scanner has a very large overall structure due to its very complicated opto-mechanical system, requires more space, and at the same time is relatively heavy. The reason for this is that when the image signal of the charge-coupled device is requisitioned, the length of the scanned data image is reduced by an optical lens based on the ratio and then projected on it, but in order to maintain a constant reduction ratio, The optical route needs to be constant and cannot be shortened or simplified; in addition, all-optical mechanical systems require many reflectors. Thus, the volume of the opto-mechanical system is not reduced. All optomechanical systems, once undertaking such heavy weight limitations, begin exploring and moving, and the power required to propel them is enormous. At present, with the trend of computers and their peripheral equipment being steadily spreading, flat-panel scanners employing a charge-coupled device device are gradually decreasing in market demand and finally being eliminated.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention uses a contact type image sensor as a scanner for image signal requisition, and provides a light path structure for adjusting a light path in order to develop a lightweight and small volume scanner. The feature is that it moves and scans while keeping the distance between the contact-type image sensor and the transparent glass layer of the scanner constant, and achieves a normal scanning effect. This allows the contact-type image sensor to maintain a focus position at which a clear scanning effect can be obtained for the scanning data. The structure of the contact type image sensor utilizes the characteristic that the light range is short, and adjusts the light range of the transparent glass layer and the contact type image sensor by installing an elastic body in the cradle of the contact type image sensor. A friction piece is installed above both ends of the image sensor, or a roller is installed on both sides of the contact type image sensor, and the friction piece presses and supports the transparent glass layer, or a roller extends along the lower part of the transparent glass layer. The moving scan is performed while maintaining a certain distance by the moving method.

[0005]

[Embodiment of the invention]

 As shown in FIGS. 1 to 3, the scanner 10 of the present invention includes a turning lid 11, a top lid 12, a transparent glass layer 13, an optomechanical system 14, a base 15, and a transmission unit 16. Among them, the optical scanning device in the opto-mechanical system 14 employs a contact type image sensor 141 as an image signal receiving device. Since the contact-type image sensor 141 has a short light beam, the scanner structure of the charge-coupled device cannot be adopted. In addition, in order to place the data to be read within the range of the focal point, it is necessary to precisely adjust the optical distance. However, the optical distance must be very short, and must be brought into contact below the transparent glass layer 13. This has been clarified by experiments. Therefore, in order to move the contact-type image sensor 141 in a state where it is fixed at a short distance, and to achieve a clear scanning effect, it is necessary to design a new light path structure. The beam path structure mainly includes the cradle 20 and the elastic body 30. The cradle 20 is installed on a shaft 163 of the transmission unit 16 and moves under the control of a control interface 161 and a motor 162 of the transmission unit 16. Next, the contact-type image sensor 141 that moves along the bottom of the transparent glass layer 13 is set in the cradle 20 having the elastic body 30 on the top. The elastic body 30 in the cradle 20 pushes and supports the contact-type image sensor 141 upward and moves in accordance with the transmission unit 16 in order to move the contact-type image sensor 141 in close contact with the bottom of the transparent glass layer 13 and move the contact-type image sensor 141 at the same distance. Adjust the distance using the elasticity. Further, in order to maintain stable movement of the contact-type image sensor 141, the friction pieces 40 and 40 'having a very small coefficient of friction are bonded above both ends of the contact-type image sensor 141. The frictional pieces 40, 40 'are in close contact with and contact with the non-scanning area of the transparent glass layer 13, and the frictional pieces 40, 40' are scratched due to friction with the transparent glass layer 13 for a long period of time. Achieves a superior light adjustment effect on the contact-type image sensor 141 in the scanner 10 by supporting the elastic body 30 and the friction pieces 40 and 40 ′ and by contacting the elastic body 30 and the friction pieces 40, 40 ′ while avoiding affecting the quality of the image. Let it.

As shown in FIG. 4, in the present invention, the friction pieces 40 and 40 ′ installed above both ends of the contact type image sensor 141 can be replaced with rollers 50 and 50 ′. These rollers 50, 50 'are provided at the side edges of both ends of the contact type image sensor 141, move along the bottom of the transparent glass layer 13, and can similarly achieve the purpose of adjusting the light path.

Further, as shown in FIG. 5, the elastic body 30 of the light path unit according to the present invention is composed of two helical springs 31, which are installed at the bottoms of both ends of the contact-type image sensor 141. It can adhere to the bottom and support it. As shown in FIGS. 6 and 7, the elastic body 30 is formed as an elastic piece 32 integrally formed with a punch press, and the contact type image sensor 141 is brought into contact with the bottom of the transparent glass layer 13 by press-formed supporting pieces at both ends of the elastic piece 32. And push and support. Thus, the distance between the contact-type image sensor 141 and the transparent glass layer 13 is kept constant, the data to be scanned is positioned within the focal range of the contact-type image sensor 141, and a clear scanning effect can be achieved.

[0008]

[Effect of the invention]

 The light path structure of the scanner of the present invention uses a contact-type image sensor, so that the overall volume is significantly reduced as compared with a known charge-coupled device scanner, and it is lightweight, and at the same time clearly captures the image of the scanning data. can do. In order to focus the contact-type image scanner on the data, the scanner is moved and scanned with the distance between the contact-type image sensor and the transparent glass layer of the scanner kept constant to achieve the normal scanning effect.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a beam path structure of a scanner according to the present invention.

FIG. 2 is a plan view of a beam path structure of the scanner of FIG. 1;
However, a state in which the turning lid is omitted is shown.

FIG. 3 is a sectional view of a beam path structure of the scanner of FIG. 1;

FIG. 4 is a perspective view showing another embodiment of the present invention, which is different from FIG. 1;

FIG. 5 is a sectional view showing another embodiment of the present invention.

FIG. 6 is a sectional view showing another embodiment of the present invention.

FIG. 7 is a side view of the elastic body of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Scanner 11 Flip lid 12 Top lid 13 Transparent glass layer 14 Opto-mechanical system 141 Contact type image sensor 15 Bottom stand 16 Transmission unit 162 Motor 20 Receiving stand 30 Elastic body 31 Spring 40, 40 'Friction piece 50, 50' Roller

Claims (4)

[Utility model registration claims] 1. An optical scanning device including a turning lid, a top lid, a transparent glass layer, a base, a transmission unit, and an optomechanical system, wherein the optical scanning device employs a contact-type image sensor as an image signal receiving device. The contact-type image sensor is provided in the light beam structure, and the contact-type image sensor is brought into close contact with and in contact with the lower part of the transparent glass layer, and is moved at a constant distance along the bottom of the transparent glass layer to be transparent. A light path structure of a scanner, wherein scanning data on a glass layer is positioned within a focal range of a contact image sensor. 2. The light striking structure has a resilient body in a cradle, the cradle being mounted on a shaft of a transmission unit and moving under the control of a motor of the transmission unit, A contact-type image sensor is set on the cradle, and the contact-type image sensor is pressed upward by the elastic body and is brought into close contact with the lower part of the transparent glass layer so that the contact-type image sensor is fixed at a certain distance from the transparent glass layer. 2. The light beam structure of the scanner according to claim 1, wherein the light beam moves while maintaining the distance. 3. A friction piece or a roller having a very small coefficient of friction is adhered on both ends of the contact type image sensor on the receiving table of the light beam structure, and the friction piece or the roller is made of transparent glass. 3. The beam path structure of a scanner according to claim 2, wherein the light path structure is in intimate contact with the non-scanning area of the layer. 4. The elastic body having the optical path structure as two helical springs or elastic pieces integrally formed with a punch press, and these helical springs or elastic pieces integrally formed with a punch press are used as contact images. 3. The light path structure of a scanner according to claim 2, wherein the light path structure is installed at the bottom of both ends of the sensor.