JPH082667Y2 - Transparent document projection device in document reading device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a transparent original projection device in an original reading device such as an analog copying machine or a digital copying machine.

[Conventional technology]

Conventionally, as a transparent original projection device in this type of original reading device, the reflection surface of the reflection surface unit is made foldable with respect to the coupling optical system side, and when not in use, it is detached from the original placing table of the copying machine main body and stored. Model (Japanese Patent Laid-Open No. 59-
198440, JP-A-59-198441) or a type in which the reflection surface unit is connected to the projection apparatus main body, and the reflection surface unit is folded and stored in the projection apparatus main body when not in use. (JP-A-59-198439) is known.

[Problems to be solved by the device]

Since the reflecting surface unit portion of the transparent original projection device in the conventional original reading device adopts a configuration that folds when not in use, a complicated configuration for maintaining the angular accuracy between the reflecting surface and the coupling optical system is adopted. In addition, the reflection surface of the reflection surface unit is adversely affected by flare and the like due to the surrounding illumination.

The present invention provides means for preventing harmful light from entering the reflection surface unit when the transparent original projection apparatus is used, and does not fold the reflection surface unit when not in use, and further, the means is provided in the projection apparatus main body. An object of the present invention is to provide a transparent original projection device that can be used as a protection means for an imaging optical system.

[Means for solving the problem]

In order to achieve the above-mentioned object, the present invention comprises a projection apparatus main body that sequentially includes an image forming optical system, a transparent original mounting opening, and an illumination optical system from the front side, and a reflective surface unit unit that includes a reflective surface and a connecting optical system. In a transparent original projecting device in an original reading device, the position in use separated from the main body of the projection apparatus, which is disposed on the original table separated from the main body of the projection apparatus, and the unused position connected to the main body of the projection apparatus The reflecting surface unit portion is moved to and from the time position, and the reflecting surface unit is fixedly held at a predetermined angle so as to direct the light beam emitted from the imaging optical system to the document table. A reflecting member, and a cover member for covering the reflecting surface and the upper surface of the connecting optical system and the side surface extending from the reflecting surface to the connecting optical system are provided, and the cover member faces the image forming optical system of the projection apparatus main body. Is opened, It is characterized in that an opening is provided which is coupled to the outer periphery of the front side of the projection apparatus main body at the time of use, and further includes locking means for coupling the cover member and the projection apparatus main body. The connecting optical system in the reflecting surface unit is characterized in that it is attached so as to be movable relative to the reflecting surface fixedly held at a predetermined angle.

[Action]

According to the configuration of the present invention, in the reflecting surface unit, the reflecting surface is fixed at an angle of 45 degrees with respect to the connecting optical system, and the cover member is arranged around the fixed reflecting surface.
For this reason, the reflective surface unit that can fold the conventional reflective surface does not require complicated adjustment for setting the reflective surface, and the cover member does not have to be used in the use position or the unused position of the transparent original projection device. In each case, it has a useful effect. That is, it is possible to eliminate unwanted illumination light when in use, and to protect the image forming lens unit on the projection apparatus main body side, the transparent document mounting opening, and the like when not in use.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, a transparent document projection device base 2 on which a transparent document projection device can be placed is provided on the side of the document reading device 1.

This transparent original projection device is provided on the transparent original projection device main body (hereinafter referred to as the projection device main body) 3 fixedly provided on the transparent original projection device stand 2 and on the original reading device 1 when the transparent original is read. The first position (solid line position in FIG. 1) placed on the document table 13 apart from the projection apparatus main body 3 that can be read by the imaging optical system 11 and the image sensor 12, and the projection apparatus when not reading. The reflecting surface unit 4 is used by moving to a second position (dashed line position in FIG. 1) that can be coupled to the front end of the main body 3.

The projection apparatus main body 3 is provided with an illumination optical system 33 that illuminates a transparent original 32 mounted in the transparent original mounting port 31, and an image forming optical system 34 that forms an image on the transparent original 32. The reflection surface unit 4 is connected to the reflection surface (hereinafter referred to as a reflection surface) 41 of a reflection mirror for directing the light beam emitted from the image forming optical system 34 to the document table 13 and a transmission document image on the document table 13. The optical system 42 is provided and reflected at a predetermined angle (45 degrees) with respect to the connecting optical system 42 so that the optical axis of the image forming optical system 34 of the projection apparatus main body 3 can be vertically incident on the connecting optical system 42. The surface 41 is integrally connected by a holding member 43. Moreover, the reflecting surface unit 4 has a cover member 44 that is opened so as to cover the upper surface and the side surface of the reflecting mirror 41 and the coupling optical system 42 and not to interrupt the optical path from the imaging optical system 34 to the reflecting surface 41. It is provided. The opening end 44a of the cover member 44 is provided at the reflecting surface unit 4
When it is moved to the second position, which is the side of the projection apparatus main body 3, it fits into the front side portion 35 of the projection apparatus main body 3, whereby the imaging optical system 34 and the transparent original mounting opening 31 can be covered, It can serve as a cover of the image optical system 34.

A Fresnel lens or a diffusing plate is used as the coupling optical system 42.

In this embodiment, the reflecting surface and the coupling optical system are integrally coupled by a holding member, but as a structure in which a part of the structure of the cover member doubles as the holding member without using the holding member, the reflecting surface It is also possible to install the connection optical system at a predetermined position.

In the document reading device 1 shown in the embodiment of the present invention, when the transparent document projection device is not used, the reflection surface unit 4
Is moved from the position of the document table 13 (FIG. 3) to the projection device main body 3 side shown in FIG. 2, and the opening end 44a of the cover member 44 of the reflection surface unit part 4 is moved to the front side part 35 of the projection device main body 3. When fitted, the cover member 44 can serve as a cover for the imaging optical system 34 and can also cover the transparent document mounting opening 31.

When the original image of the transparent original is read, the reflecting surface unit 4 is moved from the position shown in FIG. 2 to the position shown in FIG. 3 or the solid line position shown in FIG. At this time, the transparent original 32
The optical image of the image is transmitted through the image forming optical system 34 and the reflecting surface 41 to the connecting optical system 42.
Is imaged. The cover member 44 is the reflecting surface 41, and the connecting optical system 42.
Since it covers the area around, there is no flare due to the illumination of the surrounding environment.

Moreover, since the means for folding the reflecting surface 41 with respect to the connecting optical system 42 is not provided, the angle between the reflecting surface and the connecting optical system can always be kept constant, and the image distortion due to the folding of the reflecting surface. It does not occur, and since a complicated folding mechanism is not required, it is possible to provide the cover member.

FIGS. 4 to 6 show the cover member 44 provided on the reflecting surface unit portion 4 by moving the reflecting surface unit portion 4 to the projection apparatus body 3 side in the embodiment of the present invention shown in FIG. An embodiment is shown in which locking means for connecting the opening end 44a and the front side portion 35 of the projection apparatus main body 3 is provided at the fitted position.

As shown in FIG. 6 in an enlarged manner, the side plate front end portion 36 of the projection apparatus main body 3 can be engaged with the hole portion 6 provided in the vicinity of the opening end 44a of the cover member 44 of the reflecting surface unit portion 4. A stopper 5 is provided. The shape of the stopper 5 is such that one end of the stopper 5 is obstructed by the support shaft 51, and a taper surface is formed around the support shaft 51.
The engaging projection 53 having 52 is biased in the C direction by the ridge 54 from the opening 37 formed in the side plate front end 36, and is rotated to a position projecting from the opening 37.

Therefore, the reflection surface unit 4 is moved from the reading position shown in FIG. 5 to the non-reading position in FIG.
When moved to 35, the cover member 44 of the reflecting surface unit 4 is
The opening end 44a of the stopper 5 pushes the tapered surface 52 of the stopper 5 in the direction opposite to C against the force of the spring 54, and the hole 6 formed in the cover member 44 of the reflecting surface unit 4 causes the engaging projection of the stopper 5 to be formed. 53
When it reaches a position corresponding to, the engaging portion 53 of the stopper 5 and the hole portion 6 formed in the cover member 44 are fitted by the urging force of the spring 54, and the reflection surface unit portion 4 is fixed to the projection device main body 3. To be done. Further, in order to move the reflecting surface unit 4 from the position shown in FIG. 4 to the reading position shown in FIG. 5, a force is applied to the reflecting surface unit 4 in the D direction, so that the engaging projection 53 of the stopper 5 is formed. Is moved in the direction opposite to the C direction by the tapered surface 52, the engagement between the stopper 5 and the hole 6 is broken, and the reflecting surface unit 4 can be moved to the position shown in FIG.

7 to 9 show that in the embodiment shown in FIG. 1, an extendable connecting member 7 is arranged between the projection device main body 3 and the reflecting surface unit portion 4, and the reflecting surface unit portion 4 is used for reading. It can be easily installed at a predetermined position on the document table 13 side and at a storage position on the projection device main body 3 side during non-reading.

As the expandable / contractible connecting member 7, a connecting member accommodating portion 7a is provided at both lower ends of the projection device main body 3, and a connecting member at both lower end portions of the connecting member accommodating portion 7a and the cover member 44 of the reflecting surface unit portion 4 is provided. A plurality of connecting members 7b, 7b having different diameters, in the embodiment, two pipes are interposed between the connecting member 7c and 7c (8th embodiment).
In the drawing, the connecting members 7b, 7b are sequentially stacked and stored in the connecting member storage portion 7a at the storage position of the reflection surface unit portion 4 shown in FIG.

FIG. 9 shows an embodiment in which a connecting member 7 is used as a locking means for connecting the reflection surface unit portion 4 and the projection device body 3 when the reflection surface unit portion 4 is moved to the projection device body 3 side. Is shown in. That is, the projection device body 3
A stopper 8 is provided at the end of the connecting member accommodating portion 7a located at the lower end of the stopper 8. The stopper 8 is biased in the D direction around the support shaft 81 by a spring or the like, and has an engaging portion 83 having a tapered surface 82. And the engaging portion 83 has an opening 7d formed in the connecting member accommodating portion 7a.
It protrudes to the inside of the connecting member accommodating portion 7a through. On the other hand, holes 7e and 7e are formed at the ends of the connecting members 7b and 7b, respectively. Therefore, the connecting members 7b, 7b are
When the opening end 44a of the cover member 44 of the reflecting surface unit 4 is fitted into the front side portion 35 of the projection device main body 3 when it is pulled into the inside of the projection device main body 3, the connecting member accommodating portion is inserted into the holes 7e and 7e of the connecting tools 7b and 7b. The engaging portion 83 of the stopper 8 provided on the 7a is engaged. When pulling out the reflecting surface unit portion 4 from the projection apparatus main body 3, if the operating portion 84 of the stopper 8 is pressed in the direction opposite to the D direction, the stopper 8 is disengaged from the holes 7e, 7e, and the reflecting surface is removed. The unit part 4 can be set at a predetermined position shown in FIG.

The expandable and contractible connecting member shown in the embodiment has a shape in which pipes having different diameters are stacked, that is, a shape such as a so-called tripod for supporting a camera, but it may be an aclide type used for a slide rail of a drawer.

In the embodiment shown in FIG. 1, the reflecting surface 41 of the reflecting surface unit 4 is fixed to the connecting optical system 42 via the holding member 43, so that the reflecting surface 41 holds a predetermined angle.
Relative movement between 41 and the coupling optical system 42 is not possible.

In the embodiment of the present invention shown in FIG. 10, the connecting optical system 42 is arranged in the vertical direction with respect to the reflecting surface supporting member 45 capable of fixing the reflecting surface 41 held on the document table 13 while maintaining a predetermined angle. It is supported so that it can be displaced. The cover member is omitted in this embodiment.

In FIG. 10 (a), a frame-shaped base portion 45a on which the coupling optical system 42 is placed and which is in contact with the document table 13, and a reflecting surface attachment set at a predetermined angle (45 degrees) with respect to the frame-shaped base portion 45a Part 45b
The reflecting surface supporting member 45 having the above is shown, the reflecting surface 41 is attached to the reflecting surface attaching portion 45b of the reflecting surface supporting member 45, and the connecting optical system 42 is normally biased downward to the frame-shaped base portion 45a. When the reflecting surface unit 4 is separated from the document table 13 as shown in FIG.
42 is urged toward the frame-shaped base portion 45a, and when the transparent original 9 is placed on the original table 13, the reflection surface unit section 4 is positioned on the original table 13, and as shown in FIG. As described above, the coupling optical system 42 is attached to the frame-shaped base portion 45a so as to be capable of being displaced upward. The frame-shaped base 45 is provided with a restricting member 46a that allows the coupling optical system 42 to move in the vertical direction and blocks the movement in the horizontal direction.

An embodiment showing the relationship between the frame-shaped base portion 45a of the reflecting surface supporting member 45 and the coupling optical system 42 is specifically described in FIG. 11 and FIG.
For easy understanding, the front end portion 42a of the coupling optical system 42 and the front portion of the frame-shaped base portion 45a are shown, and the document table 1 in FIG. 11 is shown.
The relationship with 3 is shown in Fig. 12 (a), (b) and (c).

In FIGS. 11 and 12, reference numeral 46 denotes the left-right direction (B) of the connecting optical system 42 formed on the front and rear frame-shaped portions of the frame-shaped base portion 45a.
Direction) is a protrusion as a movement restricting member, and 47 is a plate spring for urging the front end portion 42a and the rear end portion of the coupling optical system 42 in a direction (A direction) in which they come into contact with the frame-shaped portion of the frame-shaped base portion 45a. . As is apparent from FIG. 12 (a), the lower end surface of the coupling optical system 42 biased downward by the plate spring 47 while the reflecting surface unit 4 is moved upward from the document table 13 is Frame-shaped base 45a
Is arranged so as to project from the lower end surface of the. In this state, when the transparent original 9 is placed on the original table 13 and the reflecting surface unit 4 is placed on the original table 13 (FIG. 12 (b)), the thickness of the transparent original 9 is increased. Just the length,
The coupling optical system 42 moves upward from the lower surface of the frame-shaped base 45a. Further, when the transparent original 9 is not placed on the original table 13 and the lower end surface of the connecting optical system 42 contacts the original table 13 (FIG. 12C), the lower surface of the connecting optical system 42 is a frame-shaped base. Move upward so as to match the lower surface of 45a.

FIG. 13 shows another embodiment of the moving mechanism of the coupling optical system 42 different from the embodiment shown in FIG.

In this embodiment, a portion different from the embodiment shown in FIG. 11 is projected from the frame-shaped portions of the front and rear portions of the frame-shaped base portion 45a as position regulating members in the vertical direction and the horizontal direction of the coupling optical system 42. A stepped pin 48 is provided, and this stepped pin 48
Are fitted into the holes 49a of the support frame 49 attached to the front end 42a and the rear end of the connecting optical system 42. Except for this structure, it is the same as the embodiment of FIG. 11, and is shown in FIGS.
The operating state shown in (c) is the same as that in FIG. 12 (a) (b) (c).

Also in this configuration, the position of the connecting optical system 42 is restricted by the stepped pin 48 by lifting the reflecting surface unit 4 from the surface of the document table 13, and the connecting optical system 42 is placed on the frame-shaped base 45a by the weight of the connecting optical system 42. The lower surface thereof projects from the lower surface of the frame-shaped base portion 45a (FIG. 14 (A)), and in this state, the transparent original 9 is placed on the original table 13 (FIG. 14 (B)), or Without placing the transparent manuscript 9 on the 13 (Fig. 14 (c)),
When the frame-shaped base 45a of the reflection surface unit 4 is placed on the frame 13, the connecting optical system 42 is provided with the stepped pin 48 with respect to the frame-shaped base 45a.
And is moved upward and positioned by the document table 13 or the surface of the transparent document 9 on the document table 13.

As described above, in these embodiments, the position of the reflection surface is set between the projection device main body and the document reading device by placing the frame-shaped base portion 45a of the reflection surface support member 45 on the document table 13. Is set correctly to improve the position accuracy,
Since the connecting optical system 42 is held so as to be movable up and down with respect to the frame-shaped base portion 45a of the reflecting surface supporting member 45, the position of the connecting optical system 42 depends on whether or not the transparent original 9 is placed on the original table 13. It can be displaced and the coupling optics can always be positioned in the correct position.

〔effect〕

With the configuration of the present invention, the position of the reflecting surface is fixed at a predetermined angular position, and the angle accuracy between the reflecting surface and the coupling optical system can be always maintained. Is not distorted, and the position of the reflecting surface is fixed, so that the cover member can be attached. The cover member eliminates the adverse effect on the image due to the ambient illumination, and the unused imaging optics on the side of the projector main body. It has an effect of also serving as a system and a cover of the transparent original mounting port, and has an advantage that the reflecting surface unit is not inadvertently moved from the projection apparatus main body when the transparent original projection apparatus is not used.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention, and FIGS. 2 and 3 are perspective views showing non-use positions and use positions of the reflecting surface unit portion in FIG. 1, FIG. 4 and FIG. Is an embodiment in which locking means is provided in the embodiment of FIG. 1, and is a perspective view corresponding to the second position and the first position. FIG. 6 is the locking used in FIGS. 4 and 5. FIG. 7 is an enlarged perspective view of the means, FIGS. 7 and 8 are perspective views corresponding to the second position and the first position when a connecting member is used in the embodiment of FIG. 1, and FIG. FIG. 10 (a), (b), and (c) show an enlarged perspective view of the locking means used in FIG. 8, one embodiment in which the reflecting surface in the reflecting surface unit and the coupling optical system can be relatively moved. FIG. 11 is a schematic side view showing two parts, a front view of two parts in a state of being brought into contact with and separated from a document table, and FIG. 12 (a), (b) and (c) are schematic sectional views showing the respective operating states of FIG. 11, and FIG. 13 is a partially enlarged perspective view showing another embodiment of the present invention different from FIG. 14 (a), (b) and (c) are schematic sectional views showing the respective operating states of FIG. 1 ... Original reading device, 3 ... Projector main unit, 31 ... Transparent original mounting port, 33 ... Illumination optical system, 34 ... Imaging optical system, 4
...... Reflecting surface unit, 41 ...... Reflecting mirror, 42 ...... Coupling optical system, 43 ...... Holding member, 44 ...... Cover member, 5,8 ......
Stoppers, 6, 7e ... Locking holes.

Claims (3)

[Scope of utility model registration request] 1. A transmission in a document reading apparatus comprising a projection apparatus main body which sequentially comprises an image forming optical system, a transparent document mounting opening, and an illumination optical system from the front side, and a reflection surface unit section having a reflection surface and a connecting optical system. In the manuscript projection device, the manuscript is placed on a manuscript table apart from the projection device main body, and is located between a position in use separated from the projection device main body and a non-use position coupled to the projection device main body. The reflecting surface unit includes a reflecting surface unit that is moved, the reflecting surface unit is fixedly held at a predetermined angle so that the light beam emitted from the imaging optical system is directed to the document table, and the reflecting surface unit. And a cover member that covers the upper surface of the connecting optical system and the side surface extending from the reflecting surface to the connecting optical system, and the cover member is opened toward the image forming optical system of the main body of the projection apparatus and is projected when not in use. Of the device body Transmitting original projection device in the document reading apparatus characterized by openings which are coupled to the side periphery is provided. 2. The transparent original projection apparatus in the original reading apparatus according to claim 1, further comprising a locking means for connecting the cover member and the main body of the projection apparatus. 3. The document reading apparatus according to claim 1, wherein the connecting optical system in the reflecting surface unit is attached so as to be movable relative to the reflecting surface fixedly held at a predetermined angle. Transparent original projection device.