JPH104484A - Image reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the quality of carriage lock of a scanning body in the image reader. SOLUTION: A carriage lock 24 is fitted turnably to a shaft 25a integrally formed to a lower cover 25 with snap-fit. The carriage lock 24 is fixed at any position in a lock state (solid lines) or a lock release state (imaginary lines) through the engagement between a claw 24b and a projection 25b of the lower cover 25. In the lock state, the carriage lock 24 is engaged with a hook engagement section 22a of a lamp holder 22 and the lamp holder is fixed. When a sea-saw operation section 24c of the carriage lock 24 is set to the opposite side, the locking of the lamp holder is released.

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, and more particularly to an image reading apparatus having a temporary fixing means for a scanning body.

[0002]

2. Description of the Related Art FIGS. 7 and 8 are schematic diagrams of a conventional image reading apparatus.

First, a method of reading a reflection original will be described. In the figure, P denotes a read original placed on a platen glass 101. The reflected light emitted from the light source 102 is reflected by mirrors 103, 104, and 105, and is imaged on an image sensor 107 by a lens 106.
First mirror base 1 on which light source 102 and mirror 103 are mounted
08 and second mirror base 1 on which mirrors 104 and 105 are mounted
09 is scanned at a speed of 1: 1/2 in parallel with the original table glass 101 by a driving source (not shown) through a wire (not shown), thereby reading the entire page.

Next, a method of reading a transparent original will be described.

In this conventional example, a description will be given of a transparent original unit of a type in which a transparent original illumination lamp 111 scans in synchronization with a mirror 103 of an image scanner body for reading a reflective original. A rod-shaped lamp 111 such as a xenon lamp is provided so that light transmitted through the transmission original is incident on the CCD.
Scanning is performed in synchronization with the mirror 103 by a motor 110 via a toothed belt (not shown). The light transmitted through the transmissive document is turned back by mirrors 103, 104, and 105, and is imaged on image sensor 107 by lens. A first mirror table 108 on which the light source 102 and the mirror 103 are mounted and a second mirror table 109 on which the mirrors 104 and 105 are mounted are moved in parallel to the original table glass 101 by a driving source (not shown) through wires (not shown). The entire page is read by scanning at half speed. At this time, the lamp 102 of the image scanner is not turned on.

In addition to the above-mentioned type, the transparent original unit has a CCD instead of a lamp in the transparent original unit shown in FIGS. 7 and 8, and is of a type which scans in synchronization with a mirror 103 of the image scanner body. There is something.
In this case, a lamp of the image scanner body is used as a light source.

[0007] These transparent original units are usually prepared as options of the image scanner, and are attached instead of the original platen of the image scanner. The transparent original unit is driven synchronously with the image scanner 100 by being supplied with power and a drive signal from the image scanner main body 100 through the interface cable 113.

[0008] Since the apparatus having a scanning system, whether it is the image reading apparatus main body or the transparent original reading apparatus, is a precision machine, it is very disliked that the precision is lost due to drop or vibration during transportation. In order to prevent this, a carriage lock is used as a temporary fixing means for fixing the scanning system during transportation. In conventional machines, screws that are widely used in the field have been adopted because they are most easily available as general-purpose parts and are easy to mount. More specifically, in the figure, a female screw 114 is cut in the scanning body, and is fixed by a screw 115 from outside the housing near the home position.

Further, when the carriage lock is released, a fixing portion 116 for screw storage is separately provided on the base frame 117 or the like in order to prevent the screws 115 from being lost.

[0010]

However, in the case of the above-mentioned prior art, since the carriage is locked by screws, it is inevitable that the screws will be loosened due to vibrations. Had a risk of directly causing damage to the scanning body.

Further, when a female screw is cut on the scanning body, sufficient positioning accuracy is indispensable, and the processing is troublesome.

In addition, if a screw is used, a tool is required for both locking and unlocking when the user starts using the image reading apparatus after transportation.

In particular, when setting many image reading apparatuses, it is necessary to remove each screw one by one, which takes time.

Further, after releasing the carriage lock,
There was a risk of losing the screws.

[0015] Alternatively, an internal thread may be cut in another part of the housing for storing the screw, but this is also troublesome.

Therefore, as a temporary fixing means for the scanning body during transportation, the scanning body is firmly fixed, the apparatus can be easily processed and manufactured, and the engagement and disengagement can be performed quickly without the need for tools. Development was awaited.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a high quality image reading apparatus which can easily and easily fix a scanning body. It is in.

[0018]

In order to achieve the above object, according to the present invention, there is provided a scanning member which guides image information of a document to image reading means by scanning the surface of the document so as to be reciprocally movable. In the image reading apparatus, a scanning body fixing member is provided in the image reading apparatus main body, and a hook provided on the scanning body fixing member is engaged with the scanning body, so that the scanning body can be fixed. Features.

Thus, the scanning member can be fixed or released simply by engaging and disengaging the hook provided on the apparatus main body and the scanning member. Further, since the hook portion is provided in the apparatus main body, there is no possibility of loss.
Also, there is no loosening due to vibration.

Further, the scanning member fixing member is swingably attached to the main body of the image reading apparatus, and the swinging operation switches between engagement and disengagement with the scanning member.

Thus, the scanning member can be fixed or released only by swinging the fixing member.

The rotating shaft provided on the main body of the image reading apparatus is engaged with the groove provided on the scanning member fixing member, so that the scanning member fixing member is swingable about the rotating shaft. It is also preferable that the scanning member fixing member is attached to the rotating shaft by engaging a groove provided in the image reading device main body with a rotating shaft provided in the scanning member fixing member. It is also preferred that it is pivotally mounted at the center. Thereby, the scanning member fixing member can be attached only by engaging the groove and the shaft, and the assembly of the apparatus becomes easy.

Further, the scanning member fixing member has a substantially fixing portion for substantially fixing the swing, and is substantially fixed at two positions of an engagement position with the scanning member and a disengagement position thereof. I do. According to this, it is easy to hold the engaged state and the released state.

[0024]

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the dimensions of the components described in this embodiment,
The materials, shapes, relative arrangements, and the like are not intended to limit the scope of the present invention only to them unless otherwise specified.

(Embodiment 1) In FIGS.
1 shows an image reading apparatus according to Embodiment 1 of the present invention. 1 and 2 are schematic diagrams of an image reading device.

First, a method of reading a reflection original will be described. In FIG. 1, reference numeral 1 denotes an image reading apparatus main body, which reflects reflected light obtained by irradiating a document P placed on a document table glass 2 by a light source 3 with mirrors 4, 5, and 6; Image. Light source 3
And the first mirror base 9 on which the mirror 4 is mounted and the mirror 5,
The entire page is read by scanning the second mirror table 10 on which the scanner 6 is mounted by a driving source (not shown) at a speed of 1: 1/2 in parallel with the original table glass 2 via a wire (not shown).

When reading a transparent original, the transparent original P placed on the original platen glass is scanned by the original surface and irradiated by a light source 21 of a transparent original reading unit as a scanning body for guiding image information of the original to image reading means. Then, the transmitted light passing through the document is turned back by mirrors 4, 5, and 6, and is imaged by lens 7 on image sensor 8 as image reading means.
The first mirror base 9 on which the light source 3 and the mirror 4 are mounted and the second mirror base 10 on which the mirrors 5 and 6 are mounted are not shown through wires (not shown) while being synchronized with the light source 21 of the transparent original reading unit. The entire page is read by scanning at a speed of 1: 1/2 in parallel with the platen glass 2 by the driving source. At this time, the light source 3 of the image scanner main body is kept turned off. Power and a drive signal for driving the transparent original reading unit are supplied from the image scanner main body via the interface cable 11.

In the present embodiment, the lamp holder 22 and the lamp 21 as the scanning body are fixed by a carriage lock 24 which is a scanning body fixing member rotatably mounted on a shaft 25a integrally formed with the lower cover 25. Has gone by. A hook portion 24 a is formed at the end of the carriage lock 24, and the hook portion 24 a is fixed by engaging with the engaging portion of the lamp holder 22.

FIGS. 3 and 4 are views of the vicinity of the carriage lock portion of the transparent original reading unit of the present invention viewed from the side and from below, respectively. The carriage lock 24 is rotatably attached to a shaft 25a integrally formed with the lower cover 25 by snap fitting. The carriage lock 24 is fixed in one of two positions of a locked state (solid line) and an unlocked state (imaginary line) by engagement of the claw portion 24b and the convex portion 25b of the lower cover 25. Switching between lock and release is performed by tilting the operation part 24c of the carriage lock with one of the fingers. Lamp holder 2 in locked state
The hook portion 24a of the carriage lock is engaged with the second hook engaging portion 22a, and the lamp holder 22 and the lamp 21 are fixed. When the seesaw type operation unit 24c is tilted to the opposite side, the lamp holder enters the unlocked state. In this manner, the locked / unlocked state of the carriage lock can be switched simply by pressing the seesaw type operation unit 24c with a finger. Since the carriage lock is swingably mounted on the apparatus, there is no risk of losing the carriage lock member.
Further, there is no need to provide a place for separately storing the carriage lock member. (Embodiment 2) FIGS. 5 and 6 are views of the vicinity of a carriage lock portion of a transparent document reading unit according to Embodiment 2 as viewed from the side and from below, respectively. Portions other than the carriage lock are the same as those in the first embodiment, and the same components are denoted by the same reference numerals and description thereof will be omitted.

Carriage lock 4 serving as a scanning member fixing member
4 is rotatably mounted by snap-fitting its shaft portion 44d into a groove portion 45a integrally formed with the lower cover 45. The carriage lock 44 is substantially fixed in one of two positions, a locked state (solid line) and an unlocked state (imaginary line), by engagement of the convex part 44b as a substantially fixed part and the convex part 45b of the lower cover 45. Is done. Switching between lock and release is performed by tilting the operation unit 44c of the carriage lock with one of the fingers. In the locked state, the hook part 44a of the carriage lock engages with the hook engaging part 22a of the lamp holder 22, and the lamp holder 22 as the scanning body and the lamp 21 are fixed. When the seesaw type operation unit 44c is tilted to the opposite side, the lamp holder enters the unlocked state. As described above, it is possible to switch the locked / unlocked state of the carriage lock only by pressing the seesaw type operation unit 44c with a finger. Since the carriage lock is rotatably mounted on the apparatus, there is no risk of losing the carriage lock member. Further, there is no need to provide a place for separately storing the carriage lock member.

(Other Embodiments) In the above two embodiments, only the transparent original reading unit employs a carriage lock having a seesaw-type operation unit and a hook formed at a tip end. A document reading unit (3 in FIG. 2,
A first mirror base and 5, which integrally move 4, 9 and the like;
6, 10 and the like may be employed for the carriage lock of the second mirror base that moves integrally.

[0032]

As described above, according to the present invention, the scanning body fixing member is provided on the main body of the image reading apparatus, and the hook provided on the scanning body fixing member is engaged with the scanning body.
Since the scanning member can be fixed, the scanning member can be fixed or released only by engaging and disengaging the hook provided on the apparatus main body with the scanning member. Further, since the hook portion is provided in the apparatus main body, there is no possibility of loss. Also, unlike screws, loosening due to vibration can be easily avoided. Further, there is no need to provide a separate place for storing the fixing member. Therefore, it is possible to easily and simply fix the scanning body, and to provide a high-quality image reading apparatus.

The scanning member fixing member is swingably attached to the image reading apparatus main body, and the swinging operation switches between engagement and disengagement with the scanning member. Only need to be done, no tools are required,
It is possible to fix and release the scanning body in a short time.

The rotating shaft provided on the main body of the image reading apparatus is engaged with the groove provided on the scanning member fixing member, so that the scanning member fixing member is swingable about the rotating shaft. Or the groove provided in the main body of the image reading apparatus is engaged with a rotating shaft provided in the scanning member fixing member, whereby the scanning member fixing member swings about the rotating shaft. By mounting it freely,
The scanning body fixing member can be mounted simply by engaging the groove and the shaft, and the assembly of the apparatus becomes very easy.

Further, the scanning member fixing member has a substantially fixing portion for substantially fixing the swing, and is substantially fixed at two positions of an engagement position with the scanning member and a disengagement position thereof. Can be reliably fixed and released, and the scanning body can be kept fixed even when subjected to strong vibration or impact.

[Brief description of the drawings]

FIG. 1 is a partially cutaway cross-sectional view of an image reading apparatus according to a first embodiment as viewed from above.

FIG. 2 is a partially cutaway sectional view of the image reading apparatus according to the first embodiment as viewed from the front;

FIG. 3 is a partially broken cross-sectional view of the carriage lock portion according to the first embodiment as viewed from the side.

FIG. 4 is a partially cutaway side view of the carriage lock portion according to the first embodiment as viewed from below.

FIG. 5 is a partially cutaway cross-sectional view of a carriage lock portion according to a second embodiment as viewed from the side.

FIG. 6 is a partially cutaway sectional view of the carriage lock portion according to the second embodiment as viewed from below.

FIG. 7 is a partially cutaway cross-sectional view of a conventional image reading apparatus as viewed from above.

FIG. 8 is a partially cutaway cross-sectional view of a conventional image reading apparatus as viewed from the front.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Image scanner main body 20 Transparent original reading unit 21, Transmissive original irradiation lamp 22, Lamp holder 24,44 Carriage lock 25,45 Lower cover 4,5,6 Folding mirror 7 Lens 8 CCD

Claims (5)

[Claims] An image reading apparatus in which a scanning body that guides image information of an original to image reading means by scanning a surface of an original is reciprocally movable, a scanning body fixing member is provided in an image reading apparatus main body, An image reading apparatus, wherein the scanning member can be fixed by engaging a hook portion provided on the scanning member fixing member with the scanning member. 2. The apparatus according to claim 1, wherein the scanning member fixing member is swingably attached to the image reading apparatus main body, and the swinging operation switches between engagement and disengagement with the scanning member. 2. The image reading device according to 1. A rotating shaft provided in the image reading apparatus main body;
The image reading device according to claim 2, wherein the scanning member fixing member is swingably mounted around the rotation axis by engaging a groove provided in the scanning member fixing member. apparatus. 4. The scanning body fixing member is swingable about the rotating shaft by engaging a groove provided in the image reading apparatus main body with a rotating shaft provided on the scanning body fixing member. 3. The image reading device according to claim 2, wherein the image reading device is mounted on the image reading device. 5. The scanning member fixing member has a substantially fixing portion for substantially fixing the swing, and is substantially fixed at two positions of an engagement position with the scanning member and a disengagement position thereof. The image reading device according to claim 2.