JPS63200672A - Picture input device - Google Patents

Abstract

PURPOSE:To suppress mechanical deflecting motion of a slider of a picture input device and holding the sliding orbit of the slider efficiently by using a magnetic circuit device so as to suppress the mechanical deflecting motion of the slider having an optical system and to hold the position of the slide orbit of the slider. CONSTITUTION:Reading a picture, a drive pulse signal from an electronic circuit board 14 is received by a stepping motor 12, a sensor stationary case 5 is slided along guide rails 7, 8 to read and input the picture. In this case, the optical system of the picture input device having the case 5 is susceptible to mechanical deflecting motion by its inertia energy but the magnetic attracting force cased between the guide rail 8 made of a soft magnetic substance and the roller 9 made of a permanent magnet makes the optical system of the sensor case fitted with the roller 9 immune to the mechanical deflecting motion. Moreover, the magnetic circuit device has a suppressing action as to the sensor stationary case 5 from its out of sliding track state.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image input device that reads surface image information such as characters, graph ink, photographs, etc. from the surface of a document.

[Summary of the invention]

In an image input device, the present invention provides a sliding body having an optical system and a magnetic circuit device around the sliding body, thereby suppressing the mechanical wobbling motion that occurs in the sliding body when the sliding body slides. It is designed to suppress the movement and maintain the position of the sliding body with respect to the sliding track.

[Conventional technology]

In the operation of conventional image input devices, in order to suppress the mechanical wobbling motion that occurs in the sliding body with the optical system, that is, the "flapping" phenomenon caused by the inertial energy of the sliding body, the sliding body is moved along the guide rail. A method is adopted in which spring pressure in a direction perpendicular to the sliding direction is always applied to the side surface of the sliding body.

[Problem that the invention seeks to solve]

In the above-mentioned conventional technology, the method of suppressing the "flapping" phenomenon that occurs when a sliding body having an optical system slides is simply to apply spring pressure in the side direction of the sliding body. Therefore, it is possible to obtain a certain degree of suppression effect on "flapping" in the front-rear direction, which is the sliding direction of the sliding body, and "flapping" in the left-right direction, perpendicular to the sliding direction. Regarding the upward flapping of a moving object, since it is an inactive "flapping" that is attempted to be suppressed by supporting only the sliding body's own weight, various methods are used when using a practical image input device. Terms of use, e.g.
When the image input device is used at an angle or when external vibrations are applied to the image input device during use, the input image is likely to be out of focus or out of focus.

Further, when transporting the image input device, there are problems such as the sliding body rattling in the vertical direction and being prone to failure.

[Means for solving problems]

In order to solve the above problems, the present invention suppresses mechanical wobbling motion of a sliding body having an optical system and maintains the position of the sliding track of the sliding body and its surroundings. This is done by a magnetic circuit device installed in each.

[Effect]

According to the above configuration, it is possible to suppress the mechanical shaking motion of the sliding body of the image input device and to actively maintain the position of the sliding track of the sliding body.

(Example〕 Embodiments of the present invention will be described below based on the drawings.

1 is a plan view of an embodiment of an image input device according to the present invention, FIG. 2 is a sectional view of FIG. 1, and FIG. 3 is a partially enlarged view of FIG. A fluorescent lamp 2 illuminates the surface of the document placed on top of the document, a contact type rond lens array 3 forms an image from the document surface into a same-size erect image, and a contact type rod lens array 3 converts images into electrical signals. The contact type linear image sensor 4, which converts the images into images, is attached to a sensor fixing case 5, forming an optical system of the human-powered image device. A round bar-shaped guide rail 7 whose both ends are fixed to the housing 6 slides through one end of the sensor fixing case 5 . A permanent magnet roller 9 having a pair of magnetic poles in the length direction is attached to the other end of the sensor fixing case 5, and the roller 9 runs on a guide rail 8 made of soft magnetic material fixed to the housing 6. A magnetic circuit device is formed which rotates and slides while being magnetically attracted.

□ Further, a part of the outer periphery of the timing belt 10 is fixed near the penetrating portion of the guide rail 7 of the sensor fixing case 5, and both ends of the timing belt 10 are attached to the boot IJ-11 and the stepping motor 12. It is supported by a timing pulley 13. On the other hand, a flexible cable 1 is connected to the electronic circuit board 14 for outputting image signals from the contact type linear image sensor 4.
5 and a signal line 16 of the stepping motor 12 are connected to constitute an image input device.

Next, to explain the actual operation, the original platen glass 1
When reading and inputting an image with a document placed on it, the stepping motor 12 receives a drive pulse signal from the electronic circuit board 14 and operates, and the timing pulley 1
3 and a timing bell l-10° and a sensor fixing case 5 to which a contact type linear image sensor 4 and the like are fixed via a pulley 11 are read while sliding along guide rails 7 and 8. Make input. At this time, the sensor fixing case 5 is attached to the stepping motor 12.
Due to the sliding movement caused by the fluoroscopic lamp, the contact type rod lens array 3, the contact type linear image sensor 4, and the sensor fixing case 5, there is a discontinuous movement, that is, an intermittent sliding movement. The optical system of the image input device is susceptible to mechanical wobbling motion due to its inertial energy, but in the present invention, the soft magnetic guide rail 8 and the permanent Suppression is effected by means of a magnetic circuit arrangement consisting of magnetic rollers 9 which are magnetically coupled. Specifically, due to the magnetic adsorption force generated between the guide rail 8 and the roller 9, the optical system of the sensor fixing case to which the roller 9 is attached becomes insensitive to mechanical shaking movement. or,
The magnetic circuit device also has the effect of suppressing the sensor fixing case 5 from coming off the sliding track (lifting up).

In addition, there are several methods of forming the magnetic circuit device other than the above-mentioned method. For example, the shape of the magnet attached to one end of the sensor fixing case 5 is not a roller shape, but a fixed flat plate shape. , or a U-shaped cross-sectional shape, or a magnetic circuit device in which the guide rail 8 is made of a magnetic material and the roller 9 is made of a soft magnetic material. It can also be configured to suit the required image input device.

〔Effect of the invention〕

As explained above, the present invention provides an image input device that inputs an image by sliding a sliding body having an optical system, in which images tend to occur in the front, back, left and right directions of the sliding body when the sliding body slides. This can be achieved by suppressing mechanical wobbling motion, actively maintaining the position of the sliding body with respect to the sliding track, and magnetic attraction of the magnetic circuit devices installed on the sliding body and its surroundings. As a result, it is possible to realize an image input device that has low noise when imaged manually, highly stable operation without mechanical shaking movement, and has a large tolerance to external vibrations and tilted installation. .

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of an image input device of the present invention;
2 is a sectional view of FIG. 1, and FIG. 3 is a partially enlarged view of FIG. 1. 1... Original table glass 2... Fluorescent lamp 3... Close contact type rod lens array 4... Close contact type linear image sensor 5... Sensor fixing case 6... Housing 7.8. ... Guide rail 9 ... Roller 10 ... Timing belt 11 ... Pulley 12 ... Stewing motor 13 ... Timing pulley 14 ... Electronic circuit board 15 ... Flexible cable 16 ... More than a traffic light

Claims (1)

[Claims] In an image input device that inputs plane image information to an image sensor by mechanically sliding an optical system, suppressing mechanical blurring motion caused by inertial energy of the optical system when the optical system mechanically slides. and an image input device characterized in that the position of the sliding track of the optical system is maintained by magnetic circuit devices provided in the optical system and its periphery.