JP4551530B2 - Image reading device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an image reading apparatus that reads an image by irradiating an original with an illumination device such as a light source and forming an image of reflected image light on a reading unit such as a CCD element.
[0002]
[Prior art]
Conventionally, in this type of image reading apparatus, as disclosed in Japanese Patent Application Laid-Open No. 6-308627, the light source for irradiating the document and the power supply device for this light source are both installed on the same scanning means for moving and scanning the document. It had been. Alternatively, the light source for illuminating the document is installed on scanning means for moving and scanning the document, and the power source device of the light source is fixed between the rails inside the frame that supports the scanning means so as to be able to scan.
[0003]
[Problems to be solved by the invention]
However, when the light source and the power supply device are installed on the same scanning unit as in the above-described conventional example, the width of the scanning unit, in particular, the dimension in the scanning direction is increased, and the weight of the scanning unit is increased. There has been a problem in that the motor size increases due to an increase in the torque of the motor that drives the scanning means, resulting in an increase in the overall size and power consumption of the apparatus.
[0004]
On the other hand, when the power supply device is fixed between the rails inside the frame body, the high-voltage power supply line that transmits power from the power supply device to the light source is connected to the end portion of the light source, Since the distance from the light source to the power supply device is long because the rail is located outside the rail, a long high-voltage power supply line is required, which causes a problem that power transmission efficiency is lowered. Further, there is a similar problem even in a configuration in which the power supply device is installed outside the frame. Furthermore, with any of the configurations, workability when a serviceman exchanges a substrate or the like is extremely low.
[0005]
Therefore, the present invention has been made in view of the above problems, and its purpose is to keep the overall size and power consumption of the device small, to improve power transmission efficiency, and to maintain in the market. For example.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a typical configuration of the present invention includes an original table glass on which an original is placed, a light source that irradiates the original, a power supply device for the light source, and a plurality of reflections that reflect reflected image light from the original. A reflecting member, an image forming means for forming image light of the document through the reflecting member, a reading means for reading the image light formed on the image, and a light source and the reflecting member for supporting the light source and the reflecting member at a constant speed. First scanning means for moving and scanning the image, and second scanning means for supporting and moving the reflection member and moving and scanning at a speed half that of the first scanning means while maintaining a constant distance between the object and the document to the reading means. If, in the image reading apparatus comprising at least one scan support means to move supporting said first scanning means and the second scanning means, and a frame member for supporting the platen glass and the scanning support means, at one side Support the power supply, and the other side A plate-like support member bent into an L shape having an attachment part that is detachably attached to the body, fixing means for fixing the attachment part of the support member to the frame, and power from the power supply device to the light source Transmitting means, and connection means for detachably connecting the power supply device and the transmission means, and the power supply device is connected to the scanning support means, the support member, and the frame body inside the frame body. The power supply device can be inserted into and removed from the frame body together with the support member by removing the fixing means .
[0010]
According to the present invention, the distance from the power supply device to the light source can be shortened by installing the power supply device between the scanning support means and the frame inside the frame body. It is possible to shorten the transmission means for transmitting the power to the power supply, and to improve the power transmission efficiency. In addition, since the size of the first scanning unit and the size and torque of the motor that drives the first scanning unit can be reduced, the size and power consumption of the entire apparatus can be kept small. Furthermore, by adopting a structure that can be inserted and removed from the frame, workability at the time of replacement of a substrate or the like in the market can be improved.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of an image reading apparatus to which the present invention is applied will be described in detail with reference to the drawings.
[0012]
[First Embodiment]
The image reading apparatus according to the first embodiment of the present invention will be described in detail with reference to FIGS. 1 is an explanatory diagram showing a schematic configuration of the image reading apparatus according to the first embodiment, FIG. 2 is a cross-sectional view of FIG. 1 viewed from the direction of arrow P, and FIG. 3 is a partially enlarged view of FIG. It is.
[0013]
In the figure, reference numeral 1 denotes an original platen glass for placing an original 2, 3 denotes a xenon lamp 4 as a light source, a first scanning base as first scanning means for supporting and scanning a first mirror 5, and 6 denotes a second scanning base. A second scanning stage as a second scanning means for supporting and scanning the mirror 7 and the third mirror 8, 9 is a lens as an imaging means, 10 is a CCD as a reading means, 11a and 11b are the first scanning stage 3, Rails as scanning support means for supporting scanning of the second scanning stage 6, 12 is a power supply device for the xenon lamp 4, 13 is a connector as connection means for detachably connecting the power supply device 12 and the high-voltage power supply line 14, and 14 is A high-voltage power supply line 15 for guiding the power from the power supply device 12 to the xenon lamp 4, and 15 is a power supply line support pulley for stably holding the bent portion of the high-voltage power supply line 14 that is bent as the first scanning table 3 is moved and scanned. is there.
[0014]
Reference numeral 16a denotes a frame for supporting the original table glass 1, and 16b denotes a frame for supporting the rails 11a and 11b. The frame 16 is formed by joining the frames 16a and 16b.
[0015]
Reference numeral 17 denotes a notch provided in the frame body 16 for inserting and removing the power supply device 12, reference numeral 18 denotes a support member that supports the power supply device 12, and reference numeral 19 denotes a support member 18 that supports the power supply device 12 to the frame body 16. It is a screw.
[0016]
When reading the image of the document 2 in the image reading apparatus having the above configuration, the document 2 placed on the document table glass 1 is scanned while the first scanning table 3 and the second scanning table 6 are scanned in the direction of the arrow. The image of the document 2 is read by irradiating with the xenon lamp 4 and forming an image on the CCD 10 with the lens 9 while bending the optical path with the first mirror 5, the second mirror 7 and the third mirror 8. Since the first scanning table 3 and the second scanning table 6 are driven at a speed ratio of 2: 1 by a driving device (not shown), the document is scanned while the optical path length from the document 2 to the CCD 10 is kept constant.
[0017]
In the image reading apparatus, the power supply device 12 is installed between the rail 11a and the frame body 16 on the end portion side of the xenon lamp 4 to which the high-voltage power supply line 14 is connected, and is controlled by a control device (not shown). The power is supplied to the xenon lamp 4 through the high-voltage power supply line 14.
[0018]
By installing the power supply device 12 between the rail 11a inside the frame body and the frame body 16 in this way, the distance from the power supply device 12 to the xenon lamp 4 can be shortened, so that the high-voltage power supply line 14 can be shortened. The power transmission efficiency can be improved.
[0019]
Further, since the size of the first scanning stage 3 and the size and torque of a motor (not shown) for driving the first scanning stage 3 can be reduced as compared with the conventional scanning means in which the power supply device is installed together with the light source, the apparatus The overall size and power consumption can be kept small.
[0020]
Further, the power supply device 12 is configured such that it can be inserted and removed together with the support member 18 that supports the power supply device 12 from the notch 17 provided on the side surface of the frame 16 by removing the connector 13 and the screw 19. . With this configuration, maintainability in the market can be improved.
[0021]
[Second Embodiment]
An image reading apparatus according to the second embodiment of the present invention will be described in detail with reference to FIG. FIG. 4 is an explanatory diagram showing a schematic configuration of the image reading apparatus according to the second embodiment.
In the figure, members having functions equivalent to those of the above-described embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0022]
In this embodiment, drawer connectors 20a and 20b are used as connection means instead of the connector 13 described above. The drawer connector 20 a is fixed to the support member 18 that supports the power supply device 12, and the drawer connector 20 b is fixed to the frame body 16.
[0023]
As in the first embodiment described above, the power supply device 12 is supported by the support member 18 that supports the power supply device 12, is installed between the rail 11a and the frame 16, is controlled by a control device (not shown), and has a drawer connector 20a. , 20b, and the xenon lamp 4 via the high-voltage power supply line 14.
[0024]
Then, the power supply device 12 can be inserted and removed together with the support member 18 that supports the power supply device 12 from the notch 17 provided in the frame body 16 by removing the screw 19.
[0025]
Furthermore, since the drawer connectors 20a and 20b are fixed to the support member 18 that supports the power supply device 12 and 20b to the frame 16 respectively, the power supply device 12 and the support member 18 that supports the power supply device 12 are inserted and removed. It is attached / detached with the operation.
[0026]
Therefore, with the above configuration, the same effect as the first embodiment described above can be obtained, and the maintainability in the market is further improved.
[0027]
[Third Embodiment]
An image reading apparatus according to the third embodiment of the present invention will be described in detail with reference to FIG. FIG. 5 is a partially enlarged view of the image reading apparatus according to the present embodiment. In the figure, members having functions equivalent to those of the above-described embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0028]
In the present embodiment, the power supply device 12 can be inserted and removed from the upper surface of the frame body 16. Specifically, a notch 17 for inserting and removing the power supply device 12 from the frame body 16 is provided on the upper surface of the frame body 16.
[0029]
Similarly to the first embodiment described above, the power supply device 12 is supported by the support member 18 that supports the power supply device 12, is installed between the rail 11a and the frame body 16, and is controlled by a control device (not shown). Power is supplied to the xenon lamp 4 via the high-voltage power supply line 14.
[0030]
Then, the power supply device 12 is configured such that it can be inserted and removed together with the support member 18 that supports the power supply device 12 from the notch 17 provided on the upper surface of the frame 16 by removing the connector 13 and the screw 19. .
[0031]
Also by the configuration of the present embodiment described above, the same effects as those of the first embodiment described above can be obtained.
[0032]
In the present embodiment, even if a drawer connector is used instead of the connector 13, the power supply device 12 can be removed from the notch 17 provided in the frame 16 by removing the screw 19, as in the second embodiment. The power supply device 12 can be inserted and removed together with the support member 18 that supports the power supply device 12, and the same effect can be obtained.
[0033]
Moreover, it is not limited to the structure which can be inserted / removed from the upper surface of a frame, For example, the same effect is acquired even if it takes the structure which can be inserted / removed from the bottom face of a frame.
[0034]
[Other Embodiments]
In the above-described embodiment, the xenon lamp is exemplified as the light source. However, the present invention is not limited to this, and other light sources such as a cold cathode tube and an LED may be used.
[0035]
In the above-described embodiment, the single scanner is exemplified as the image reading device. However, the present invention is not limited to this. It may be an image reading apparatus in a multi-function machine that combines functions such as FAX, and the same effect can be obtained by applying the present invention to the image reading apparatus.
[0036]
【The invention's effect】
As described above, according to the present invention, the power supply device for the light source includes the scanning support means for supporting the first scanning means and the second scanning means, and the scanning support means in the frame for supporting the document table glass. Since it is configured so as to be installed between the frame body and can be inserted / removed from a notch provided in the frame body, it is possible to increase power transmission efficiency and to keep the overall size and power consumption of the apparatus small. In addition, maintainability in the market can be improved.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a schematic configuration of an image reading apparatus according to a first embodiment. FIG. 2 is a cross-sectional view of the image reading apparatus according to the first embodiment shown in FIG. FIG. 4 is a partially enlarged view of the image reading apparatus according to the first embodiment shown in FIG. 1 as viewed from the direction of arrow Q. FIG. 4 is an explanatory diagram showing a schematic configuration of the image reading apparatus according to the second embodiment. Partial enlarged view of the image reading apparatus according to the embodiment
DESCRIPTION OF SYMBOLS 1 ... Original plate glass 2 ... Original 3 ... 1st scanning stand 4 ... Xenon lamp 5 ... 1st mirror 6 ... 2nd scanning stand 7 ... 2nd mirror 8 ... 3rd mirror 9 ... Lens
10 CCD
11a, 11b ... rail
12… Power supply
13… Connector
14… High voltage feeder
15 ... Feed line support pulley
16 ... Frame
16a ... frame
16b ... frame
17… Notch
18… Support member
19… Bis
20a, 20b Drawer connector

Claims (3)

A platen glass on which a document is placed;
A light source for illuminating the document;
A power supply device for the light source;
A plurality of reflecting members that reflect reflected image light from the document;
Imaging means for forming image light of the document through the reflecting member;
Reading means for reading the imaged image light;
A first scanning unit that supports the light source and the reflecting member and moves and scans an image of the document at a constant speed;
A second scanning means that supports the reflecting member and moves and scans at a speed half that of the first scanning means while maintaining a constant distance between the object and the document to the reading means;
At least one scanning support means for moving and supporting the first scanning means and the second scanning means;
A frame that supports the document table glass and the scanning support means;
In an image reading apparatus comprising:
A plate-like support member bent in an L shape having an attachment portion that supports the power supply device on one side and is detachably attached to the frame on the other side;
Fixing means for fixing the attachment portion of the support member to the frame;
Transmitting means for transmitting power from the power supply device to the light source;
Connection means for detachably connecting the power supply device and the transmission means,
The power supply device is installed between the scanning support means and the support member and the frame body inside the frame body, and the fixing means is removed, so that the power supply device is removed from the frame body together with the support member. An image reading apparatus configured to be possible . A platen glass on which a document is placed;
A light source for illuminating the document;
A power supply device for the light source;
A plurality of reflecting members that reflect reflected image light from the document;
Imaging means for forming image light of the document through the reflecting member;
Reading means for reading the imaged image light;
First scanning means for supporting the light source and the reflecting member and moving and scanning an image of the document at a constant speed;
A second scanning unit that supports the reflecting member and moves and scans at a speed half that of the first scanning unit while maintaining a constant distance between the object and the document to the reading unit;
At least one scanning support means for moving and supporting the first scanning means and the second scanning means;
A frame that supports the document table glass and the scanning support means;
In an image reading apparatus comprising:
A plate-like support member bent in an L shape having an attachment portion that supports the power supply device on one side and is detachably attached to the frame on the other side;
Fixing means for fixing the attachment portion of the support member to the frame;
Transmitting means for transmitting power from the power supply device to the light source;
Connection means for detachably connecting the power supply device and the transmission means,
The power supply device is installed between the scanning support means and the support member and the frame body inside the frame body, and the fixing means is removed, so that the power supply device is removed from the frame body together with the support member. Configure as possible
The connecting means is a drawer connector composed of a portion fixed to the support member and a portion fixed to the frame body, and with the operation of inserting and removing the support member and the power supply device from the frame body, images reader you wherein the attaching and detaching the said transmitting means and said power supply device. The image reading apparatus according to claim 1 or 2, characterized in that a cutout for connecting or disconnecting the power supply from the frame into the frame.

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