JP4182492B2 - Image reading apparatus and multifunction machine - Google Patents

Description

  The present invention relates to an image reading apparatus and a multifunction peripheral.

Conventionally, in addition to a reflective reading mechanism that optically reads a document image by detecting the intensity of light that is irradiated from the same side as the image sensor and reflected by the document with respect to a document table that holds the document, the document In contrast, there is an image reading apparatus in which a reflection plate that reflects light emitted from a light source is provided on the opposite side of the light source so that a reflection-type and transmission-type original image is read by the same reading mechanism (for example, , See Patent Document 1 below).

Conventionally, there is an image reading apparatus that includes a light source and an image sensor that are arranged to face each other with a document table interposed therebetween, and reads a transmission type document by receiving light emitted from the light source by the image sensor. In such a light source in the image reading apparatus, an irradiation area having a width that can irradiate the entire document is secured.

As such an image reading apparatus, there is an image reading apparatus that includes a cover member that holds an original on a document table and prevents unnecessary external light from entering the image sensor. Some image reading apparatuses having a cover member are provided with a light source on the cover member. As the light source, a fluorescent tube or an LED is used.

JP-A-6-178059

However, in the technique of Patent Document 1 described above, the light focused on the image sensor when reading a transmissive original is light that has been transmitted twice through the transmissive original, so that it corresponds to the thickness of the original. Although the document images are doubled with a deviation, image data is generated, so that there is a problem that the accuracy of the image data reproducing the document is lower than that of the original document.

On the other hand, as described in the above-described conventional technology, an image reading apparatus including a light source and an imaging element that are opposed to each other with a document table interposed therebetween can accurately read a document. Depending on the light source, there are the following problems.

In the light source using a fluorescent tube, there is a problem that it takes time until the light quantity that can be read is stabilized after the light source is turned on. Further, when an irradiation area having a width that can irradiate the entire document is secured by a light source using a fluorescent tube, there is a problem that the light source becomes larger and the image reading apparatus becomes larger as the light source becomes larger.

In addition, with a light source using an LED, it is possible to read a document image immediately after lighting, and noise generation in image data can be reduced as compared with the case where a fluorescent tube is used.
Since the irradiation area per LED is limited, it is necessary to provide a plurality of LEDs in order to secure an irradiation area wide enough to irradiate the entire document. For this reason, the light source becomes larger and the light source becomes larger. There is a problem that the size of the image reading apparatus increases with the increase in size. In addition, when a plurality of LEDs are used in a single light source, there is a problem that the quality of image data is lowered due to variations in the amount of light for each LED, and the manufacturing cost of the image reading apparatus is increased.

As described above, in the image reading apparatus in which the light source is provided on the cover member, when either the fluorescent tube or the LED is used, if the cover member increases in size as the light source increases, There is a problem that the operation of moving the cover member for setting is troublesome.

An image reading apparatus according to the present invention includes a light source provided on a cover member that is movable toward and away from a document table that holds a document, and an image sensor provided on the opposite side of the light source with the document table interposed therebetween. An image sensor moving mechanism that moves the image sensor in the scanning direction, a drive source that supplies a driving force to the image sensor moving mechanism, and a light source provided on the cover member. A light source moving mechanism for moving in the scanning direction, and a connecting mechanism for connecting the light source moving mechanism and the image sensor moving mechanism in a interlocking manner according to the contact / separation state of the cover member with respect to the document table. Features.

Therefore, in the image reading apparatus, the light source moving mechanism and the image sensor moving mechanism can be interlocked according to the contact / separation state of the cover member. As a result, the image reading apparatus can reduce the size of the image reading apparatus by sharing the drive source and reduce power consumption due to the common use of the drive source. As a result, the user can easily link the light source moving mechanism and the image sensor moving mechanism with only the work of moving the cover member toward and away from the document table, and obtain highly accurate image data.

Further, the connection mechanism in the above-described image reading device includes the light source moving mechanism and the image sensor moving mechanism when the cover member is in a state where the light emitted from the light source can be received by the image sensor. Are connected.

Therefore, in the image reading apparatus, the light source moving mechanism and the image sensor moving mechanism can be interlocked only when the transmission type original can be read. As a result, the image reading apparatus drives the light source moving mechanism and the image sensor moving mechanism by a single drive source by linking the light source moving mechanism and the image sensor moving mechanism only when reading a transmission type document. By doing so, the load on the drive source can be minimized. In addition, this enables the user to obtain highly accurate image data using an image reading apparatus that minimizes power consumption.

In the above-described image reading apparatus, the image reading apparatus further includes a hinge portion that rotatably connects one end portion of the cover member and a main body housing that houses the imaging element, and the cover member is interposed via the hinge portion. It is characterized in that it can be moved toward and away from the document table by rotating with respect to the main body housing.

Therefore, in the image reading apparatus, the cover member can be moved toward and away from the document table by rotating the cover member around the hinge portion that connects one end of the cover member to the main body housing. Thus, the image reading apparatus can link the light source moving mechanism and the image sensor moving mechanism without any special work or operation by the user. This also allows the user to obtain highly accurate image data by linking the light source moving mechanism and the image sensor moving mechanism in an easy operation.

Further, the drive source in the image reading apparatus described above is provided in the main body housing.

Therefore, in the image reading apparatus, the weight of the cover member can be reduced. As a result, the image reading apparatus can reduce the burden on the user accompanying the rotation of the cover member. In addition, this allows the user to obtain highly accurate image data by rotating the cover member with a small burden and interlocking the light source moving mechanism and the image sensor moving mechanism.

Further, the drive source in the image reading apparatus described above may be provided on the cover member.

Therefore, in the image reading apparatus, the number of members provided in the main body housing can be reduced. As a result, the image reading apparatus can prevent the image reading apparatus from being damaged due to heat generation due to the inside of the main body housing becoming overcrowded. This also enables the user to obtain highly accurate image data by simply using a small image reading apparatus with reduced power consumption and only moving the cover member to and away from the document table. .

Further, the light source in the above-described image reading apparatus is constituted by an LED.

Therefore, the image reading apparatus can read a document immediately after lighting. As a result, the image reading apparatus can start reading a document quickly and improve the reading accuracy. Thus, the user can obtain highly accurate image data in the minimum necessary time.

According to another aspect of the present invention, there is provided an image forming apparatus that forms an image on a recording medium according to the intensity of light incident on an image sensor included in the image reading apparatus, the image reading apparatus, and the image reading apparatus.
It is characterized by providing.

Therefore, in the multifunction machine, the light source moving mechanism and the image sensor moving mechanism can be interlocked according to the contact / separation state of the cover member in the image forming apparatus. As a result, the multi-function device can reduce the size of the multi-function device by sharing the drive source and reduce power consumption due to the common use of the drive source. As a result, the user can obtain high-precision image data only by the operation of moving the cover member to and away from the document table using a small-sized multifunction machine with reduced power consumption.

(Embodiment 1)
Exemplary embodiments of an image reading apparatus according to the present invention will be explained below in detail with reference to the accompanying drawings. The first embodiment shows an application example to a scanner device that realizes the image reading device according to the present invention.

FIG. 1 is a perspective view illustrating an appearance of the scanner device according to the first embodiment. First, the appearance of the scanner device according to the first embodiment will be described with reference to FIG. As shown in FIG. 1, the scanner device 100 includes a main unit 110 and a transmissive original light source unit (hereinafter referred to as “TPU unit”) 120 as a cover member.

The TPU unit 120 is disposed to face the main unit 110 and is connected to the main unit 110 via a hinge portion (see FIG. 3). The TPU unit 120 is connected to be pivotable in a direction away from the main unit 110 from the state shown in FIG.

FIG. 2 is a longitudinal front view of the scanner device 100 according to the first embodiment. Next, FIG.
The schematic configuration of the scanner device 100 according to the first embodiment will be described using FIG. As shown in FIG. 2, the scanner device 100 includes a main body housing 210 that forms an outline of the main body unit 110.
And a TPU housing 230 that forms an outline of the TPU unit 120.

The main body housing 210 and the TPU housing 230 are mainly formed of two parts that can be separated in the vertical direction. Although a special symbol is omitted, hereinafter,
The parts constituting the upper side of the main body housing 210 and the TPU housing 230 will be described as an upper main body housing and an upper TPU housing. Similarly, the parts constituting the lower side of the main body housing 210 and the TPU housing 230 will be described as a lower main body housing and a lower TPU housing.

First, a schematic configuration of the main unit 110 will be described. The main body housing 210 in the main body unit 110 has an opening 211 that opens toward the TPU housing 230.
It has. A document table glass 212 is provided at the opening 211 so as to close the opening 211.

In the first embodiment, a reading window is realized by the opening 211 and the original platen glass 212, and a frame member is realized by the periphery of the opening 211 in the main body housing 210. On the platen glass 212, a document to be read is placed.

In the space 213 formed by the main body housing 210 and the platen glass 212,
An optical member 214 is provided for optically reading an image of the document placed on the document table glass 212. The optical member 214 includes a reflection light source 215 that irradiates light toward the platen glass 212, and a plurality of mirrors 216 that guide the light emitted from the reflection light source 215 and reflected from the document to a predetermined path, and are guided by the mirror 216. Image sensor 217 that receives the emitted light
And a lens 218 for imaging the light guided by the mirror 216 on the image sensor 217.

As the image sensor 217, for example, a photodiode that photoelectrically converts an optical image formed on the light receiving surface and outputs an electrical signal corresponding to the amount of light received for each element can be used.
In the scanner device 100, the linear image sensor in which the above-described photodiodes are linearly arranged on the scanning circuit board 219 along the main scanning direction is an image sensor 217.
It is used as.

In the space 213, a scanner carriage 220 is provided. The scanner carriage 220 is provided to be slidable along a carriage guide 221 that is parallel to the document table glass 212 and extends in the sub-scanning direction.

A driving force generated by a motor 222 as a power source is transmitted to the scanner carriage 220 via an image sensor moving mechanism 223 connected to the motor 222. As will be described later, the image sensor moving mechanism 223 is configured by a gear train coupled to the drive shaft of the motor 222, a drive belt 225 spanned between the gear constituting the gear train and the driven gear 224, and the like. (See FIG. 3). The scanner carriage 220 is connected to the drive belt 225.

In the scanner carriage 220, the driving force generated by the motor 222 is driven by the image sensor moving mechanism 2.
23 is transmitted through the original platen glass 212 and moved in the sub-scanning direction. The optical member 214 described above is mounted on the scanner carriage 220. The optical member 214 moves in the sub-scanning direction along the platen glass 212 as the scanner carriage 220 moves.

Next, a schematic configuration of the TPU unit 120 will be described. The TPU housing 230 in the TPU unit 120 is provided with an opening 231 that opens toward the main body housing 210 on the side facing the main body housing 210. Further, the TPU housing 230 is provided with a protective mat 232 at a position covering the opening 231. The protective mat 232 is detachably attached to the TPU housing 230.

The TPU housing 230 is provided with a light source for transmission (see FIG. 3) as a light source. The transmissive light source unit is used when a light-transmissive original such as a photographic film is read, and irradiates light toward the original table glass 212. The light source unit for transmission is provided so as to be movable in the sub-scanning direction along the platen glass 212.

The TPU housing 230 is provided with a power transmission mechanism (see FIG. 3) that transmits the driving force of the motor 222 described above to the light source for transmission. Although detailed illustration and description are omitted, T
The power transmission mechanism provided in the PU unit 120 includes, for example, a pulley group coupled to the image sensor moving mechanism 223, a drive belt 233, and a gear pair on which the drive belt 233 is bridged (partly FIG. 3). reference).

In the first embodiment, the power transmission mechanism provided in the TPU housing 230 is connected to the motor 222 when the protective mat 232 is detached from the TPU housing 230, and the driving force of the motor 222 is used as the transmission light source unit. Configured to communicate. In this case, only when the protective mat 232 is removed from the TPU housing 230, the light source unit for transmission moves together with the scanner carriage 220 in the sub-scanning direction under the driving force of the motor 222.

In the reading operation of a light transmission type original (hereinafter referred to as “film”) such as a film, on the original table glass 212, that is, the main unit 110 and the TPU unit 120.
A film folder 240 is installed between the two. The film folder 240 is a member that guides the installation position of the film and fixes the installed film at the reading position so that the film is installed at the reading position for the film on the platen glass 212.

FIG. 3 is a perspective view showing a partial cross section of the scanner device 100. In FIG. 3, TP
A state in which the upper TPU housing in the U housing 230 is removed and a part of the main body housing 210 is cut is shown. In FIG. 3, reference numeral 300 denotes a main unit 110 and a TPU.
It is a hinge part that connects the unit 120. Hereinafter, each part to which the driving force of the motor 222 is transmitted will be described with reference to FIG.

As shown in FIG. 3, the image sensor moving mechanism 223 provided in the main body housing 210 includes a gear 301 fixed to the drive shaft of the motor 222, and gear trains 302 to 3 connected to the gear 301.
06. A gear on which the above-described drive belt 225 is hung is provided on the shaft serving as the rotational axis of the gear 306.

The image sensor moving mechanism 223 uses the driving force generated by the motor 222 as the gears 301 to 301.
By transmitting to the drive belt 225 via 306, the drive belt 225 is rotated. Accordingly, the scanner carriage 220 connected to the drive belt 225 can be moved along the sub-scanning direction.

In addition, a pulley 307 having the rotation axis as the axis is provided on the axis serving as the rotation axis of the gear 306. The pulley 310 is connected to a gear 310 that constitutes a connecting mechanism 309 via a plurality of pulley groups 308 that rotate as the pulley 307 rotates. Gear 31
0 forms a coupling mechanism 309 by meshing with a gear 313 provided on the TPU unit 120 side through openings 311 and 312 that open toward the TPU unit 120 side on the upper surface of the main body housing 210.

The TPU housing 230 is provided with a pulley group 315 that connects one gear 314 and the gear 313 in the gear pair on which the above-described drive belt 233 is suspended. The other gear 316 in the gear pair rotates following the rotation of the drive belt 233. The gear 314 and the gear 316 are disposed to face each other along the sub-scanning direction. Here, the drive belt 233,
A light source moving mechanism is configured by the gears 314 and 316 constituting the gear pair and the pulley group 315.

Reference numeral 317 in FIG. 3 is a stay that supports shafts such as the gear 313, the pulleys that constitute the pulley group 315, and the gear 314. The gear 313 is provided so as to be able to contact and separate from the stay 317. Thereby, the gear 310 and the gear 313 can be engaged with each other in a separable manner.

Reference numeral 318 in FIG. 3 indicates the above-described transmission light source unit. The transmission light source unit 318 is coupled to the drive belt 232 at a fixing unit 319 provided in the transmission light source unit 318. As a result, the transmissive light source unit 318 moves along the sub-scanning direction as the drive belt 232 rotates.

The TPU housing 230 has a guide rail 3 extending along the sub-scanning direction at a position on the side of the drive belt 232 and overlapping the movement locus of the light source 318 for transmission.
20 is provided. A groove 321 provided at a position facing the guide rail 320 in the light source for transmission 318 is fitted into the guide rail 320. Thereby, the transmission light source unit 318 can be stably moved along the sub-scanning direction.

The light emitted from the transmission light source unit 318 is guided to the original platen glass 212 side through the opening 322 provided in the TPU housing 230. The opening 322 is a light source unit 31 for transmission.
8 is provided so as to cover the reading range of the film.

FIG. 4 is an exploded perspective view showing the transmissive light source unit 318. With reference to FIG. 4, the light source section 3 for transmission
The configuration of 18 will be described. As shown in FIG. 4, the transmissive light source unit 318 includes an LED 401.
And a light guide plate 402 for propagating the light emitted by the LED 401. The light guide plate 402 can irradiate an area wider than the irradiation area per LED. In FIG. 4, the imaginary line written on the light guide plate 402 indicates an effective light emitting area on the light guide plate 402.

Light propagated through the light guide plate 402 is irradiated toward the document table glass 212 from the opening 406 provided in the support frame 405 via the prism sheet 403 and the diffusion sheet 404. By passing through the prism sheet 403 and the diffusion sheet 404, it is possible to irradiate a wider area with the light propagated through the light guide plate 402.

In the light source unit 318 for transmission, on the side opposite to the opening 406 with the light guide plate 402 in between,
A reflection plate 407 that reflects the light propagated through the light guide plate 402 toward the opening 406 is provided. By providing the reflecting plate 407, the light propagated through the light guide plate 402 can be efficiently irradiated to the document table glass 212 side. The fixing portion 319 described above is provided on the side of the support frame 405, and opens upward so as to sandwich the drive belt 233 from the document table glass 212 side.

FIG. 5 is an enlarged perspective view (part 1) showing the coupling mechanism 309, and FIG. 6 is an enlarged perspective view (part 2) showing the coupling mechanism 309. FIG. 5 shows a state where the gear 310 and the gear 313 are engaged with each other. FIG. 6 shows a state where the gear 310 and the gear 313 are separated from each other.

As can be seen from FIGS. 5 and 6, the gear 313 in the coupling mechanism 309 is provided with gear teeth 501 that protrude toward the TPU unit 110. The gear 310 in the coupling mechanism 309 has a recess 601 in which the gear teeth 501 are engaged. Recess 60
1, the upper part of the rib 602 that forms the recess 601 has a mountain shape that protrudes toward the gear 313 toward the center. As a result, the gear teeth 501 can be guided to the recess 601 so that the gear 310 and the gear 313 mesh smoothly.

Although illustration is omitted, in addition to the configuration described above, the scanner device 100 includes an operation panel that accepts various instruction operations by the user, various control circuits that drive and control each unit in the scanner device 100, and instructions received by the operation panel. A control system for controlling various control circuits according to operations is provided. The operation panel accepts an instruction operation for reading an image of a document such as paper that does not transmit light (reflection-type document), an instruction operation for reading an image on a film, and the like.

In addition, although not illustrated, the scanner device 100 may include a communication I / F that performs communication with an external device such as a personal computer. In this case, the scanner device 100 receives a command corresponding to the instruction operation received by the personal computer via the communication I / F.

The scanner device 100 moves the scanner carriage 220 or reflects the light source 2 for reflection in accordance with an instruction operation received via the operation panel or a command received via the communication I / F.
15 and the transmission light source unit 318 are turned on / off, and image data is generated by photoelectrically converting light imaged on the image sensor 217.

The scanner device 100 may store the generated image data in an arbitrary storage medium, or may transmit the generated image data to an external device such as a personal computer via a communication I / F.

When reading an image of a film by the scanner device 100 having such a configuration,
The user installs the film folder 240 on the platen glass 212 and installs the film at a predetermined position guided by the film folder 240. Further, the user removes the protective mat 232 from the TPU housing 230 before and after the installation of the film.

Subsequently, as shown in FIG. 1 or FIG.
10 to face. Thereby, the gear 310 and the gear 313 in the coupling mechanism 309 are engaged with each other, and the imaging element moving mechanism 223 and the light source moving mechanism are coupled.

Thereafter, the user performs an instruction operation for reading an image on the film. The instruction operation may be performed via an operation panel provided in the scanner device 100, or may be performed on an external device such as a personal computer.

When there is an instruction operation for reading an image on the film, the scanner device 100 includes the motor 22.
2 is driven and the amount of light received by the image sensor 217 is detected while moving the scanner carriage 220 and the light source for transmission 318 along the sub-scanning direction. Then, image data is generated based on the detected amount of received light.

Prior to the generation of the image data, various reference data serving as black and white standards in the image data may be acquired, and shading correction of the image data may be performed using the acquired reference data. Since the acquisition of the reference data and the shading correction using the acquired reference data are known techniques, description thereof is omitted here.

As described above, according to the scanner device 100 of the first embodiment, the light source moving mechanism and the image sensor moving mechanism 22 are changed according to the contact / separation state of the TPU unit 120 with respect to the main unit 110.
3 can be linked.

As a result, the scanner device 100 can be configured by using the motor 222 in common.
It is possible to reduce the power consumption due to the miniaturization of 0 and the common use of the motor 222. As a result, the user can easily link the light source moving mechanism and the image sensor moving mechanism 223 with only the work of bringing the TPU unit 120 into and out of contact with the platen glass 212 to obtain highly accurate image data. .

Further, according to the scanner device 100 of the first embodiment, the light source moving mechanism and the image sensor moving mechanism 223 can be interlocked only when the film can be read. Thus, the scanner device 100 drives the light source moving mechanism and the image sensor moving mechanism 223 by the single motor 222 by interlocking the light source moving mechanism and the image sensor moving mechanism 223 only when reading the film. The load on the motor 222 by
It can be minimized. As a result, the user can obtain highly accurate image data by using an image reading apparatus that minimizes power consumption.

Further, according to the scanner device 100 of the first embodiment, the TPU unit 120 is rotated with respect to the main body unit 110 with the hinge unit 300 as the rotation center, without any special work or operation by the user. The light source moving mechanism and the image sensor moving mechanism 223 can be interlocked. Thus, the user can obtain highly accurate image data by linking the light source moving mechanism and the image sensor moving mechanism 223 with an easy operation.

Further, according to the scanner device 100 of the first embodiment, the motor 222 is provided with the main body housing 2.
10 to reduce the weight of the TPU unit 120,
It is possible to reduce the burden on the user accompanying the rotation of the user. As a result, the user can rotate the TPU unit 120 with a small burden and link the light source moving mechanism and the image sensor moving mechanism 223 to obtain highly accurate image data.

Further, according to the scanner device 100 of the first embodiment, the transmissive light source unit 318 includes the LED 3.
Therefore, the film can be read immediately after the LED 301 is turned on. Thereby, the scanner device 100 can start reading the film quickly and improve the reading accuracy. Thus, the user can obtain highly accurate image data in the minimum necessary time.

(Embodiment 2)
Next, a preferred embodiment 2 of the image reading apparatus according to the present invention will be described in detail with reference to the accompanying drawings. The second embodiment shows an application example to a scanner device that realizes the image reading device according to the present invention. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is also omitted.

FIG. 7 is a perspective view showing a partial cross section of the scanner device 100 according to the second embodiment.
FIG. 7 shows a state where the upper TPU housing in the TPU housing 230 is removed and a part of the main body housing 210 is sectioned. Hereinafter, each part to which the driving force of the motor 222 is transmitted will be described with reference to FIG.

As shown in FIG. 7, the pulley 307 is connected to the coupling mechanism 30 via a plurality of pulley groups 308.
The magnetic body 710 which comprises a part of 9 is connected. The magnetic body 710 rotates around an axis parallel to the axial direction of the pulley group 308 when the driving force of the motor 222 is transmitted through the pulley group 308.

The magnetic body 710 is disposed opposite to the magnetic body 713 provided on the TPU unit 120 side via openings 311 and 312 that open toward the TPU unit 120 side on the upper surface of the main body housing 210. The magnetic body 710 and the magnetic body 713 are connected so as to be separable by an attractive force that attracts each other. Here, pulley 307, pulley group 308, magnetic body 71
0, the openings 311 and 312 and the magnetic body 713 constitute a coupling mechanism 709. The magnetic body 713 is provided so as to be rotatable around an axis parallel to the axial direction of the magnetic body 710.

The magnetic bodies 710 and 713 constituting the coupling mechanism 709 may have both magnetic forces that attract each other, or at least one of them may have a magnetic force that attracts the other. When one of the magnetic bodies 710 or 713 has a magnetic force, the other is formed of a material having a property of being attracted by a magnetic force, such as iron.

The coupling mechanism 709 causes slippage between the magnetic body 710 and the magnetic body 713 when the torque transmitted from the image sensor moving mechanism 223 is larger than a predetermined value, and causes the pulley group 315 to generate a torque greater than a predetermined magnitude. It has a torque limiter function that does not transmit. Here, the torque having a predetermined magnitude is a torque necessary for moving the light source unit 318 for transmission.

A transmission light source unit such as a transmission light source unit 318, a pulley group 315, or a gear pair on which a drive belt 233 is mounted even when a torque of a predetermined magnitude or larger is transmitted by the torque limiter function in the coupling mechanism 709. It is possible to prevent breakage of each part related to the movement of 318.

8 is an enlarged perspective view (No. 1) showing the coupling mechanism 309, and FIG. 9 is an enlarged perspective view (No. 2) showing the coupling mechanism 709. FIG. 8 shows a state where the magnetic body 710 and the magnetic body 713 are coupled by magnetic force. FIG. 9 shows a state where the magnetic body 710 and the magnetic body 713 are separated from each other.

As can be seen from FIGS. 8 and 9, the magnetic body 713 in the coupling mechanism 709 has the stay 3.
The magnetic body 710 is connected to the magnetic body 710 when it is separated from the stay 17, and the magnetic body 710 is separated when it is located near the stay 317. In the magnetic bodies 710 and 713, surfaces facing each other are flat surfaces (see reference numeral 901). As a result, a wide surface on which the attractive force is applied can be secured, and the magnetic body 710 and the magnetic body 713 can be reliably connected.

When reading an image of a film by the scanner device 100 having such a configuration,
The user installs the film in the same manner as in the first embodiment described above, removes the protective mat 232 from the TPU housing 230, and then rotates the TPU unit 120 so that the TPU unit 120 faces the main unit 110. . As a result, the coupling mechanism 70
9, an attractive force acts between the magnetic body 710 and the magnetic body 713 in FIG.
Are connected to the light source moving mechanism.

As described above, according to the scanner device 100 of the second embodiment, similarly to the first embodiment, the light source moving mechanism, the image sensor moving mechanism 223, and the like according to the contacting / separating state of the TPU unit 120 with respect to the main unit 110. By linking the two, it is possible to reduce the size of the scanner device 100 due to the common use of the motor 222 and reduce the power consumption due to the common use of the motor 222.

As a result, the user can easily link the light source moving mechanism and the image sensor moving mechanism 223 with only the work of bringing the TPU unit 120 into and out of contact with the platen glass 212 to obtain highly accurate image data. .

In the scanner device 100 according to the first and second embodiments, the configuration example in which the motor 222 is provided in the main body housing 210 has been described. However, the configuration is not limited thereto. The motor 222 may be provided in the TPU housing 230. In such a scanner device, the number of members provided in the main body housing 210 can be reduced.

Thus, the scanner device 100 can prevent the scanner device from being damaged due to heat generation due to the inside of the main body housing 210 becoming overcrowded. This also allows the user to use a small scanner with reduced power consumption and obtain high-precision image data only by rotating the TPU unit 120 with respect to the platen glass 212. Can do.

(Embodiment 3)
Next, a preferred third embodiment of the image reading apparatus according to the present invention will be described in detail with reference to the accompanying drawings. The third embodiment shows an application example to a multifunction machine that realizes the image reading apparatus and the multifunction machine according to the present invention. In the third embodiment, the same parts as those in the first and second embodiments are denoted by the same reference numerals, and description thereof is also omitted.

FIG. 10 is a perspective view illustrating an external appearance of the multifunction peripheral according to the third embodiment. The MFP 1000 according to the third embodiment records an image according to the intensity of light incident on the scanner device 100 described in the first and second embodiments and the image sensor 217 included in the scanner device 100. And a printer 1001 as an image forming apparatus formed on top.

The scanner device 100 and the printer 1001 are connected so as to be able to communicate with each other via a communication I / F (not shown). The scanner device 100 outputs image data corresponding to the intensity of light incident on the image sensor 217 to the printer 1001.

The printer 1001 includes a printer engine that forms an image on a recording medium such as paper. Although illustration and description are omitted because it is a known technique, various methods such as an ink jet method, an electrostatic transfer method, and a sublimation transfer method can be applied as an image forming method in the printer engine.

In the multifunction peripheral 1000 having such a configuration, the printer 1001 forms an image on a recording medium such as paper based on the image data output from the scanner device 100.

According to such a multi-function peripheral 1000, an image based on image data obtained by accurately reproducing an image of a document can be formed on a recording medium such as paper, regardless of the type of document. Also,
Accordingly, the user can obtain a recording medium on which an image based on image data obtained by accurately reproducing an image of a document is formed regardless of the type of the document.

FIG. 2 is a perspective view showing an appearance of the scanner device according to the first embodiment. 1 is a longitudinal front view of a scanner device according to a first embodiment; FIG. The disassembled perspective view which shows the light source unit for transmission. The perspective view which expands and shows a connection mechanism (the 1). The perspective view which expands and shows a connection mechanism (the 2). FIG. 5 is a perspective view showing a partial cross section of a scanner device according to a second embodiment. The perspective view which expands and shows a connection mechanism (the 1). The perspective view which expands and shows a connection mechanism (the 2). FIG. 9 is a perspective view illustrating an appearance of a multifunction machine according to a third embodiment.

Explanation of symbols

212 Document Glass, 120 TPU Unit, 318 Light Source for Transmission, 217 Image Sensor, 100 Scanner Device, 223 Image Sensor Moving Mechanism, 222 Motor, 309 Connection Mechanism 300 Hinge Unit, 1000 Multifunction Device, 1001 Printer

Claims (2)

In an image reading apparatus, comprising: a light source provided on a cover member that is detachable with respect to a document table that holds a document; and an image sensor provided on the opposite side of the light source with the document table interposed therebetween.
An imaging element moving mechanism for moving the査direction running said imaging element,
A driving source for supplying a driving force to the image sensor moving mechanism;
A light source moving mechanism provided on the cover member for moving the light source in the scanning direction;
A first gear for transmitting a driving force to the light source moving mechanism;
A stay fixed to the cover member and supporting the shaft of the first gear;
A second gear coupled to the imaging element moving mechanism and transmitting a driving force to the first gear;
The first gear is provided so as to be able to contact and separate from the stay,
The second gear is formed with a recess in which the gear teeth of the first gear are meshed, and a rib located between the recesses has a chevron shape protruding toward the center,
The first gear meshes with the second gear only when the cover member is closed.


An image reading apparatus. An image reading apparatus according to claim 1 ;
An image forming apparatus that forms an image on a recording medium according to the intensity of light incident on an image sensor included in the image reading apparatus;
A multi-function machine comprising:

Images