JP2553909B2 - Image recording device - Google Patents

Description

The present invention relates to an image recording apparatus having an optical lens system for projecting an optical image of a document on a projection surface, and more particularly to an image recording apparatus for projecting an image on an information recording medium such as a microfilm. The present invention relates to an image recording device that projects and records on an image.

(Prior Art) As a means for rotating image information projected on an information recording medium, an image rotating optical system using a prism lens is known, and this image rotating optical system is an image recording apparatus for a microfilm reader printer or the like. Widely applied in equipment.

By the way, conventionally, in this type of image recording apparatus,
In order to facilitate replacement of the projection lens, which is the means for converting the magnification of the projected image, as shown in FIG.
The projection lens 101 is dropped onto the projection lens 101, the prism lens 102 is mounted on the projection lens 101, and the prism lens 102 is held by the lens base 103 to form an image rotation and magnification conversion optical system.

(Problems to be Solved by the Invention) However, in such a conventional example, vibration of the apparatus main body due to driving of an actuator such as a motor and mirror scanning at the time of image recording operation is caused by the lens stacking configuration. Since the prism lens 102 is amplified and swings on the projection lens 101, the projection image is disturbed and the image quality of the recorded image is deteriorated.

Therefore, the present invention has been made in order to solve the above-mentioned problems of the prior art, and an object of the present invention is to suppress the vibration of at least two optical lens systems that are stacked and detachably held, and An object of the present invention is to provide an image recording apparatus capable of preventing disturbance and obtaining a high quality recorded image.

(Means for Solving the Problem) In order to achieve the above object, in the present invention, at least two optical lens systems for guiding an optical image of a document to a projection surface are detachably held in a stacked state. And a support member that is detachably held on one optical lens system and elastically abuts on the lens barrel of the other optical lens system at at least three points. And

The lens system is composed of a projection lens held on a base and a prism lens for image rotation mounted on the projection lens, and the base is openable / closable for attaching / detaching the lens system. A door portion is provided, and the supporting member is made elastic by the elastic first supporting portion provided on the door portion and the elastic second and third supporting portions provided on other portions of the base. It is characteristically supported.

(Operation) In the present invention having the above configuration, at least two optical lens systems are detachably held in a stacked state on the base, and the other optical lens system is held on one optical lens system. The lens barrels are elastically abutted and supported at at least three points by the supporting member.

(Example) Below, this invention is demonstrated based on the Example shown in figure. FIG. 4 is a schematic perspective view of a microfilm reader / printer according to the present invention, in which A is a reader unit, B is a printer unit, F is a microfilm as a document, 10 is a halogen lamp for projection, 11 is a reflecting plate consisting of a spherical mirror, 12 is a reflecting mirror, 13 is a condenser lens,
The illumination unit is configured by these. Reference numeral 2 is a projection lens, 15, 16, 17, 18 are reflection mirrors, and 21 is a projection screen. Further, 19 and 20 are scanning mirrors arranged so as to form 90 ° with each other, and 22 is a photosensitive drum as a projection surface. The scanning mirrors 19 and 20 are movable in the arrow W or R direction, and are normally retracted to a position deviated from the projection optical path a in the arrow W direction, and are moved in the R direction during printing to move in the optical path a. Located in the start position of W
The projection image of the film F is scanned and exposed on the photosensitive drum 22 through the slit 23 by moving in the direction of the optical path b.

Further, around the photosensitive drum 22, image forming means such as a known charging device, developing device, transfer device, and cleaner, which are not shown, are arranged, and copying by electrophotography is performed. After the exposure of the image on the photosensitive drum 22 is completed, the scanning mirrors 19 and 20 are
When it moves in the W direction and returns to the retracted position outside the projection optical path a, the movement is stopped.

1 to 3 show an embodiment of an optical lens holding device according to the present invention. FIG. 1 is a front view, FIG. 2 is a plan view, and FIG. 3 is a rear view. In the figure, 1 is a prism lens for image rotation as the other optical lens system,
Reference numeral 2 is a projection lens as one optical lens system for projecting image information of the microfilm F, 3 is a lens holder into which the projection lens 2 is dropped, and 4 is a lens base as a lens base for holding the lens holder 3. Reference numeral 5 is an opening / closing door as a door portion, 6 is a leaf spring as a supporting member (second and third supporting portions) bent in a substantially U shape for supporting the prism lens 1 from the side, and 7 is also the supporting member. A leaf spring that supports the prism lens 1 as the (first support portion).

Here, the prism lens 1 is provided so as to overlap with the projection lens 2 by fitting the inner peripheral surface of the flange portion 2a of the projection lens 2 and the inner peripheral surface of the seat 1a of the prism lens 1,
On the other hand, the projection lens 2 is dropped into the lens holder 3, and a holder ring 3a provided on the upper portion of the holder 3 receives the flange portion 2a of the projection lens 2. Here, the prism lens 1 and the projection lens 2 are removable,
In addition, the bottom surface 3b provided under the projection lens 2 is attached to the lens base 4
The projection lens 2 can be detached from the lens base 4 by sliding the rail surface 4a.

The leaf spring 6 is fixed to the side wall 4b of the lens base 4 so that the prism lens 1 is sandwiched between two arms in the horizontal direction. Further, the leaf spring 7 is fixed to the opening / closing door 5 downward, and abuts on the prism lens 1 at a support portion 7a provided at the tip thereof. As shown in FIG. 2, the opening / closing door 5 has a shaft 8 engaged with a hinge 9 fixed to a base (not shown), and is rotatable about the shaft 8.

In the above configuration, when the prism lens 1 is placed on the projection lens 2 as shown in FIG. 2, the leaf spring 6 attached to the lens base 4 comes into contact with the prism lens 1 and is deformed from the shape shown by the broken line. The prism lens 1 is supported by two supporting points 6a and 6b. When the open / close door 5 is rotated clockwise from the open broken line position about the shaft 8 as a fulcrum to close the door 5, the supporting portion 7a of the leaf spring 7 causes the prism lens 1 to move.
The spring 7 is deformed by contacting with, and the prism lens 1 is supported by its elastic force. Here, the opening / closing door 5 is attracted to the lens base 4 by the magnetic force of a magnet (not shown), and is kept closed.

As described above, since the prism lens 1 is supported at three points by the support points 6a, 6b and the support portion 7a, it is possible to prevent the prism lens 1 from swinging due to the vibration of the apparatus body. The optical image of the microfilm F is guided to the photosensitive drum 22 without being disturbed, and high-quality image recording can be performed.

Next, replacement of the projection lens 2 will be described. First, when the opening / closing door 5 is rotated counterclockwise to open it, the supporting portion 7a of the leaf spring 7 supporting the prism lens 1 is released, so that the prism lens 1 moves in the direction of arrow G in FIG. Can be easily extracted. Then, after pulling out the prism lens 1 to the outside of the opening / closing door 5, the lens holder 3
Slide the bottom surface 3b of the lens along the rail surface 4a of the lens base 4,
This is pulled out in the direction of arrow F. Furthermore, the projection lens 2 that has been dropped into the lens holder 3 is attached to the lens holder 3
Take it out further and replace it with another projection lens of different magnification.

As described above, in the present embodiment, the leaf spring 7 does not prevent the prism lens 1 from being inserted / removed and the projection lens 2 is exchanged, and the conventional workability can be maintained. .

FIG. 5 and FIG. 6 show another embodiment of the present invention. The same parts as those in the above embodiment are designated by the same reference numerals. It is moved in conjunction with the opening and closing of.

That is, in the above embodiment, when the opening / closing door 5 is opened to release the support of the prism lens 1 by the leaf spring 7,
As shown in FIG. 2, the prism lens 1 receives a force from the leaf spring 6 and tilts in the direction of arrow A, so that the optical axis of the projection light moves.

Therefore, in this embodiment, as shown in FIG.
When the opening / closing door 5 is opened, the leaf spring 6 is moved in the arrow D direction to release the support.

First, the opening / closing of the door 5 and the interlocking mechanism with the leaf spring 6 will be described. The shaft 32 is supported by the support fittings 37 and 38, and the compression coil spring 36 passing through the shaft 32 is supported by the support fitting 38 and the shaft.
Since it is compressed by the stopper 39 fitted into the shaft 32, a force in the direction of arrow C acts on the shaft 32 due to the repulsive force of the spring 36. Here, a connecting plate 31 is engaged with the shaft 32, and a shaft 40 that slides in an elongated hole 31a of the connecting plate 31 is attached. On the other hand, a shaft 41 that engages the slide plate 30 and slides in the elongated hole 30c of the slide plate 30 is attached to the connecting plate 31, and the connecting plate 31 is further attached to a base 33 (not shown). It is rotatable around.

The slide plate 30 reciprocates in the arrow D or E direction by sliding the side surfaces 30a, 30b on the side surfaces 34a, 35a of the guide plates 34, 35. The fixed leaf spring 6 contacts the wall 4a of the lens base 4 and stops at a predetermined position.

In the above structure, as shown in FIG.
When the door is closed, the projection 5a of the opening / closing door 5 pushes the shaft 32 in the direction of arrow B, and the connecting plate 31 engaged with the shaft 32 rotates clockwise around the shaft 33 as a fulcrum, so that it is fixed to the slide plate 30. The leaf spring 6 moves in the direction of arrow E and supports the prism lens 1 at the fulcrums 6a and 6b.

On the other hand, when the opening / closing door 5 is opened as shown in FIG.
The shaft 32 moves in the direction of arrow C due to the repulsive force of the shaft 32, and the connecting plate 31 engaging with the shaft 32 rotates counterclockwise around the shaft 33 as a fulcrum. And the prism lens 1 is released from the support. afterwards,
When the leaf spring 6 further moves in the direction of arrow D and the leaf spring 6 and the wall portion 4a of the lens base 4 collide with each other, the leaf spring 6 is indicated by arrow D.
The movement in the direction and the movement of the shaft 32 in the direction of the arrow C stop.
The other structure and operation are the same as those of the above-mentioned embodiment, and therefore the explanation thereof is omitted.

Although the microfilm reader printer according to the present invention has been described in the above embodiment, the present invention is not limited to this, and any device that guides an image of a document to a projection surface via a lens system may be used. For example, it can be applied to a copying machine, a document reading device, and the like.

(Effects of the Invention) In the present invention having the above-described configuration and operation, at least two optical lens systems are removably held on the base in a stacked state and held on one optical lens system. Since the lens barrel of the other optical lens system is elastically contacted and supported at each of at least three points, it is possible to prevent the vibration of the plurality of optical lens systems stacked while maintaining the ease of lens replacement. As a result, a high quality recorded image can be obtained.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of an optical lens holding device of an image recording apparatus according to the present invention, FIG. 2 is a plan view of the same embodiment, and FIG. 3 is the same embodiment with an opening / closing door opened. 4 is a schematic rear view showing the optical system of the reader / printer of the same embodiment, FIG. 5 is a plan view showing another embodiment of the present invention, and FIG. 6 is a state in which the opening / closing door is opened. FIG. 7 is a plan view showing the same embodiment, and FIG. 7 is a front view showing an optical lens holding device of a conventional image recording device. Explanation of reference numerals 1 ... Prism lens (other optical lens system) 2 ... Projection lens (one optical lens system) 4 ... Lens base (lens base) 6, 7 ... Leaf spring (support member) 22 ... Photosensitive drum (projection) Surface) F ... Micro film (original)

Claims (2)

(57) [Claims] 1. A lens base for removably holding at least two optical lens systems for guiding an optical image of an original onto a projection surface, and a removably held one optical lens system. An image recording apparatus comprising: a support member that elastically contacts at least three points with respect to the lens barrel of the other optical lens system. 2. The lens system is composed of a projection lens held on a base and a prism lens for image rotation mounted on the projection lens, and the lens system is attached to and detached from the base. Therefore, a door portion that can be opened and closed is provided, and the support member includes an elastic first support portion provided on the door portion and elastic second and third support portions provided on other portions of the base. The image recording apparatus according to claim 1, wherein the prism lens is elastically supported.