JP2003307789A - Image reader - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain the simplification of an image reader and the reduction of noise. <P>SOLUTION: An interface connector is arranged so as to be separated from a main base plate, and the protrusion part of the interface connector comes into contact with a guide shaft, so that grounding is attained. The interface connector is directly fixed to a frame body. <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 apparatus for reading an original on a platen glass by scanning an image sensor.

[0002]

2. Description of the Related Art FIG. 4 is a schematic view of a conventional reader.
In FIG. 4, after the document P is placed on the platen glass 105, the document cover 1 is closed and the document P is pressed onto the glass. The reading unit 110 rotates the motor 106,
The platen glass 105 is guided by the guide bar 102.
The image on the original P is read by scanning in parallel with. Reference numeral 101 denotes a frame that also serves as an exterior cover, in which the following components are arranged.

In the reading unit 110, three-color (R, G, B) LEDs, which are light sources for illuminating an original, a rod lens array and an image sensor for forming reflected light from the original on a light receiving element of the image sensor. Is incorporated. The three color light sources are sequentially switched and turned on, and the image sensor reads the reflected light from the original for each color, thereby performing color separation reading.

The reading unit 110 is arranged on the holder 107. The holder 112 has a slider 112
Is provided and is slidably supported on the guide shaft 102. The end of the guide shaft 102 is supported by the bearing of the frame 101, is fixed to the frame 101 with screws, and is prevented from rotating and positioned. The reading unit 110 is attached to the holder 107 in the guide shaft 1.
Motor 105, which is a drive source for moving along
Is provided.

A transmission mechanism for transmitting the driving force from the motor 106 to the holder 107, that is, the reading unit 110 is accommodated in the frame 101. Drive wire 104
Has one end fixed to the frame 101 and the other end supported by a biasing means (not shown) to maintain a predetermined tension.

The driving force of the motor 106 is transmitted to the pulley 103. In this way, the pulley 103 rotates in the normal and reverse directions according to the forward and reverse rotations of the motor 106, whereby the reading unit 110
Is reciprocally movable in parallel with a platen glass (not shown). Further, a main substrate 108 is provided in the frame body 101.
A flat cable 111 which is a control signal path of the reading unit 111 and a flat cable 113 which is a control signal path of a motor are connected.

[0007]

However, in the above-mentioned conventional example, since the interface connector is not in contact with the guide shaft, the conduction between the guide shaft and the interface connector cannot be obtained. Therefore, problems such as noise were likely to occur.

Further, in the conventional example, since the interface connector is mounted on the main board, the main board is fixed to the frame body with screws or the like. However, the position of the interface connector hole and the interface connector in the frame body is fixed. It was difficult to match.

[0009]

According to the present invention, troubles such as noise are eliminated by bringing the interface connector and the guide shaft into contact with each other. In addition, the interface connector is attached directly to the frame, which makes it easier to position it in the hole in the frame.

[0010]

DETAILED DESCRIPTION OF THE INVENTION

1 is a schematic view of the configuration of an image reading apparatus according to the present invention. 101 is a frame, 102 is a guide shaft fixed to the frame 101, 107 is a holder, and 11
0 is a reading unit supported by a holder 107, 1
Reference numeral 06 denotes a motor fixed to the holder 107, 103 denotes a pulley fixed to the holder 107, which rotates in synchronization with the driving wire 104 to scan the reading unit 110, 122 denotes a main substrate fixed to the holder 107, 126 5 is a tact switch arranged on the main board 122, 128 is a connector arranged on the main board 122, 123 is a USB connector board, and 124 is a USB connector for connecting a USB cable from outside the apparatus. As shown in the figure, the protrusion 1
By projecting 24b under the guide shaft 102 and moving it in the direction of arrow C, the projection 124a is fitted into the frame 101 and fixed.

Reference numeral 125 is a connector for transmitting the signal line of the USB connector to the flexible cable 121. One end of the flexible cable 121 is inserted into the connector 125 on the USB connector board and the other end is inserted into the connector 128 on the main board. By being folded back, the paper is laid around in the apparatus so that a wide surface comes in a direction perpendicular to the original platen glass (not shown).

The flexible cable 121 is the reading unit 11
Pass the side of the reading unit 110 so that it does not come under 0. In this state, when the reading unit reciprocates, the flexible cable does not come into contact with the glass and therefore does not buckle.

A button 127 is supported by the frame 101. FIG. 2 is a diagram when the reading unit is at the home position. In this state, when the button 127 is pressed, the tact switch 126 is turned on and the reading is started.

(Other Embodiments) As shown in FIG. 6, the USB connector is a type in which a flexible cable connector is built in, and even if it is directly attached to the frame and the projection is brought into contact with the shaft to drop the ground. good.

[0015]

According to the present invention, troubles such as noise are eliminated by bringing the interface connector and the guide shaft into contact with each other. Further, by directly mounting the interface connector on the frame, the positioning with the hole of the frame becomes easy and the assembling property is improved.
Further, by integrating the member for grounding with the connector, there is a cost reduction effect.

[Brief description of drawings]

FIG. 1 is a schematic diagram of an image reading apparatus of the present invention.

FIG. 2 is a diagram in which the scanning body in FIG. 1 has moved to a home position.

FIG. 3 is an external view of the device in FIG.

FIG. 4 is a diagram showing a conventional example.

5 is a top view of the vicinity of the USB connector in FIG. 1. FIG.

FIG. 6 is a diagram showing a second embodiment.

FIG. 7 is a diagram showing a state in which a USB connector and a shaft are in contact with each other.

[Explanation of symbols]

102 guide shaft 110 reading unit 121 flat cable 122 Main board 123 USB board 124 USB connector

Claims (4)

[Claims] 1. A scanning member which is provided with an image sensor and a scanning driving source and scans under a document table glass, a guide member for guiding the scanning member, and a holding member for holding the guiding member. An image reading device for reading an image on a document placed on a platen glass, which has a substrate for controlling reading scanning and an interface connector for connecting to an external device on or outside the frame. In the apparatus, the image reading apparatus is characterized in that a protruding portion integrally arranged with the interface connector is arranged so as to contact the guide member. 2. The image reading device according to claim 1, wherein the interface is a USB. 3. An image sensor and a scanning drive source are provided, and a scanning body that scans under a document table glass, a guide member that guides the scanning body, and a holding member that holds the guiding member. An image reading device that has a substrate for controlling reading scanning and an interface connector for connecting to an external device on the frame or outside the frame, and reads an image on a document placed on a platen glass In the image reading device, the interface connector is directly attached to the frame. 4. The image reading device according to claim 3, wherein the interface is a USB.