JP2003295354A - Image reader - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the workability in replacing a xenon lamp on a first mirror mount and also, to attain the miniaturization of an image reader. <P>SOLUTION: The xenon lamp is installed on the first mirror mount for a 1:2 reciprocating scanning optical system, and a base plate for turning on the lamp is fixed on the main body, a power feed cable for feeding the power to the lamp from the base plate is connected to a cable from the lamp by a cable guide arranged on the first mirror mount so as to guide the power feed cable. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading device such as a copying machine, a facsimile and a scanner.

[0002]

2. Description of the Related Art A conventional image reading apparatus will be described with reference to FIG. In FIG. 1, the xenon lamp 102,
Platen glass 300, first mirror 104, second mirror 1
07, the third mirror 108, a lens 114, a light receiving element (photoelectric conversion element) 115, an image processing unit, and the like. Then, when a document such as a book or a sheet-shaped document is placed on the platen glass 100 with the document surface facing down, and the reading start key is pressed, the xenon lamp 102 causes the lower part of the platen glass 100 to move in the direction of arrow a in FIG. To scan the image information on the document surface.

In such a conventional image reading apparatus, as described in Japanese Utility Model Publication No. 3-34744 and Japanese Patent Application Laid-Open No. 9-185954, a xenon lamp and a power supply cable are integrally formed.

[0004]

By the way, the xenon lamp 102 may need to be replaced due to poor quality such as poor lighting, or reduction in illuminance due to life. In such a case, if the xenon lamp 102 and the power supply cable 112 are integrated, the xenon lamp 10
Even if only 2 is defective, the power supply cable 112 must be replaced, which is economically wasteful, and the power supply cable 112 that crawls a complicated route is pulled out and rewired again after replacement. However, it requires a considerable amount of time and effort, which significantly deteriorates the workability of replacement.

Therefore, as shown in (FIG. 5), an example in which a relay connector 310 is provided in the vicinity of the scanning system light source so that the light source and the power feeding cable can be exchanged separately, and Japanese Patent Laid-Open Publication No. Hei 8 (1999) -83868.
There is an example in which the connector portion is integrally formed with the holder as in the case of -46756, but in these cases, the relay connector 3
There is a drawback in that the first mirror stand becomes large in order to secure a space for installing the connector 10 and the connector portion, and inevitably the entire apparatus also becomes large.

[0006]

In view of the above problems, therefore, in the present invention, an original table on which an original is placed, illumination means for illuminating the original placed on the original stand, and an image of the original are reflected. A first mirror, a second mirror, and a third mirror, and a first scanning unit that supports and moves the illumination unit and the first mirror,
A second scanning unit that supports and moves the second mirror and the third mirror; a power feeding unit that supplies power to the illumination unit;
In the image reading apparatus including: the illuminating means, a glass tube, and at least a pair of electrode layers integrally formed on the outer peripheral surface of the glass tube over substantially the entire area in the tube axis direction,
A connection for connecting at least one pair of conductive wires connected to each electrode and a supporting means for supporting the glass tube and provided at an end of the glass tube for electrically connecting and fixing the conductive wire and the power feeding means. The purpose of the present invention is to provide a small-sized image reading device which is easy to replace the xenon lamp, excellent in economical efficiency, by providing the fixing means.

[0007]

DETAILED DESCRIPTION OF THE INVENTION

[First Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an image reading apparatus embodying the present invention. The platen glass 100 includes a frame 111.
Supported by. The first mirror base 101 includes a xenon lamp 102, a reflection shade 103, a first mirror 104, and a first mirror 104.
A cable guide 105 is supported. The second mirror base 106 supports the second mirror 107, the third mirror 108, and the second cable guide 109. The inverter board 110 for lighting the xenon lamp is fixed to the frame 111. Power supply cable 1 for supplying power from the inverter board 111 to the xenon lamp 102
12 is the inverter board 110 by the connector 113.
, And the xenon lamp 102 via the second cable guide 109 and the first cable guide 105. Reference numeral 114 is a lens, and 115 is a CCD. With the above-described structure, the image of the original placed on the original table glass 100 is illuminated by the xenon lamp 102, and the lens 114 is used while bending the optical path by the first mirror 104, the second mirror 107, and the third mirror 108. An image is formed by CCD 115. The first mirror base 101 is driven by a driving means (not shown).
By moving the second mirror table 106 at a speed ratio of 2: 1, the image is read while keeping the object tube distance from the document to the CCD 115 constant.

Next, the structures of the xenon lamp 102 and the power supply cable 112, which are the features of the present invention, will be described.

FIG. 2 is a perspective view showing the internal structure of the holder portion 121 of the xenon lamp 102. Glass tube 1
22 two conductive wires 12 for supplying electric power to the xenon lamp 102 to the high-voltage electrode 123 and the low-voltage electrode 124, which are integrally formed on the outer peripheral surface over almost the entire area in the tube axis direction.
5, 126 are directly soldered. And that 2
The conductive wires 125 and 126 of the book are guided to the outside from the notch 127 of the holder 121, and crimp terminals 128 and 129 are attached to the ends thereof, respectively.

FIG. 3 is a top view showing a peripheral portion of the first cable guide 105 of the first mirror base 101. The power supply cable 112 is composed of two conductive wires 131 and 132, and screw terminals 1 to which screws can be respectively fastened at their ends.
33 and 134 are attached and fixed to the first cable guide 105. The crimp terminals 128, 129 are screwed to the screw terminals 133, 134 to be electrically connected. Crimp terminals 128 and 129 and screw terminals 13
In the first cable guide 105 in the peripheral portion of 3,134,
Mutual crimp terminals 128,129, screw terminals 133,13
Partition part 1 so as not to short-circuit with 4 or surrounding conductive members
05a, b, c are provided. Power cable 112
Is guided by the first cable guide 105 so as not to hinder the movement of the first mirror base 101 and the second mirror base 106.

Further, the screw terminals 133 and 134 are fixed to the holder portion 121 instead of the first cable guide 105, and the crimp terminals 128 and 129 are attached to the screw terminals 133 and 134.
The same effect can be obtained by screwing on.

[0013]

Second Embodiment (FIG. 4) shows a second embodiment.

In the second embodiment, the xenon lamp 102 is used.
High-voltage electrode 123, two conductive wires 125 and 126 soldered to the low-voltage electrode 124, and the power supply cable 112
Terminals 201, 202, 203, and 204 are attached to the two conductive wires 131 and 132, respectively, constituting the above. The terminals 201 and 202 are the first cable guide 205.
Further, the terminals 203 and 204 are fixed to the lid member 206. The compression springs 207 and 208 are connected to the terminals 201 and 20.
It is supported by the first cable guide 205 so as to come into contact with 2. The lid member 206 is attached to the first cable guide 205.
When fixed, the compression springs 207 and 208 are connected to the terminals 203,
It contacts 204 and is electrically connected.

[0015]

According to the present invention, the following effects can be obtained.

1. Since it is not necessary to disconnect the power supply cable when replacing the xenon lamp, workability during maintenance is significantly improved.

2. Since the xenon lamp and the power supply cable can be replaced independently, the economy at the time of replacement is excellent.

3. Of the power supply cable and the xenon lamp,
Since the cable guide is used for electrical connection and fixing,
The space required for connection is not required, the mirror base can be downsized, and the entire device can be downsized.

[Brief description of drawings]

FIG. 1 is an image forming apparatus embodying the present invention.

FIG. 2 is a diagram illustrating a structure of a xenon lamp embodying the present invention.

FIG. 3 is a diagram illustrating a configuration of a first cable guide according to the present invention.

FIG. 4 is a diagram illustrating a second embodiment of the present invention.

FIG. 5 is a diagram illustrating a conventional example.

[Explanation of symbols]

100 platen 102 lighting means 104 First mirror 107 Second mirror 108 Third mirror 101 First scanning means 106 Second scanning means 112 power supply means 122 glass tube 123,124 electrodes 125,126 Conductive wire 121 Supporting means 105 Connection fixing means

Claims (3)

[Claims] 1. A document table on which a document is placed, a fluorescent lamp for illuminating the document placed on the document table, a first mirror, a second mirror and a third mirror which reflect an image of the document, and A first scanning unit that supports and moves the fluorescent lamp and the first mirror, a second scanning unit that supports and moves the second mirror and the third mirror, and power supply that supplies power to the fluorescent lamp. In the image reading apparatus including means, the fluorescent lamp includes a glass tube and an outer peripheral surface of the glass tube.
At least a pair of electrode layers integrally formed over substantially the entire area of the tube axis, at least a pair of conductive wires connected to the respective electrodes, and the glass tube supporting the glass tube were provided at the ends thereof. An image reading apparatus comprising a supporting means, and a connection fixing means for electrically connecting and fixing the conductive wire and the power feeding means. 2. The connecting and fixing means is integral with a guide means for guiding the power supply cable.
The image forming apparatus described. 3. The image forming apparatus according to claim 1, wherein the connection fixing means is integral with a supporting means provided at an end portion of the fluorescent lamp.