JP2001100322A - Mirror holding structure for photograph printing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To integrally form a holder holding a mirror, a supporting arm guided by a guide rail and a rack arranged at the supporting arm as the mirror holding structure of a photograph printing device. SOLUTION: The mirror 11 is held by the holder 14 and the supporting arm 14a is integrally formed at the holder 14. Then, the rack 17 is integrally formed at the arm 14a. The length L2 of the arm 14 is set to be longer than the length L1 of the rack 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a mirror holding structure for a photographic printing apparatus, and more particularly to a mirror holding structure for a photographic printing apparatus used in a photographic printing apparatus capable of selectively printing video images and film images. is there.

[0002]

2. Description of the Related Art For example, JP-A-63-257742 discloses a film image recorded on a photographic film and a CRT.
Discloses a photographic printing apparatus which can selectively print a video image displayed on a photosensitive material.

In this photographic printing apparatus, a lens for printing a film image and a photosensitive material are sequentially arranged below a photographic film, and a CRT having a display screen facing upward is arranged alongside the photosensitive material. A first mirror (sub-mirror), a second mirror (main mirror) above the photosensitive material, and a video image printing lens between these mirrors.
The light from the RT is guided to the photosensitive material via the first and second mirrors, and the first and second mirrors are extracted from the optical path when printing a film image.

Recently, with the development of digital cameras and the like,
Film image (analog image) and CR
There has been a demand for a photographic printing apparatus that can selectively print a video image (digital image) displayed on a T on a photosensitive material or synthesize an analog image and a digital image. .

[0005] However, the photographic printing apparatus currently owned by the majority of small-scale developing laboratories is dedicated to analog image processing, and the photographic printing apparatus capable of processing both analog images and digital images is expensive. But because
There has been a demand for a so-called digital kit which can add a digital image exposure function by a relatively simple modification to a conventional photographic printing apparatus having only an analog image exposure system at a low cost.

A general photographic printing apparatus used conventionally has, for example, a structure schematically shown in FIG. That is, a light source unit 42 for illuminating a print target frame set in the negative carrier unit 41 is provided on an upper portion of the main body 2 of the photoprinting apparatus 1, and light transmitted through the print target frame is converted into a film image printing lens 43. Thereby, an image is formed on the photosensitive material (paper) 44. Paper 44
Is pulled out of the roll paper 45 and set at the printing position, and the exposed paper 44 is placed in the printing section 46.
After passing through the developing unit 47 to be developed, the drying is performed by the drying unit 48 and then sent to the sorter unit 50. And a lens 4 for film image printing.
A space 51 exists between the position 3 and the paper print position below the space 3. An optical unit for performing special printing is detachably mounted in the space 51.

[0007]

By the way, in order to add a function of printing a digital image such as a video image to the photographic printing apparatus 1 for analog image printing having the above-described structure, the above-mentioned publication is disclosed. Similarly to the photographic printing apparatus described in the patent application, a digital image display unit including a CRT (or LCD) as an image display means based on a digital image signal, and an image displayed on the CRT is exposed on a paper 44. It is necessary to attach an optical unit for performing the operation.

However, since the optical unit is interposed in the analog exposure system, when printing an analog image, it is necessary to retract the mirror position of the optical unit from the analog exposure system. When exposing a digital image, it is necessary to move a mirror to a predetermined position so that the mirror can be used. However, by repeating the movement of the mirror,
There is a possibility that the backlash of parts may occur and the mounting accuracy of the mirror may be reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has a relatively simple structure, and can maintain a high mounting accuracy even when the mirror is repeatedly moved and used. It is intended to provide a retaining structure.

[0010]

According to the present invention, there is provided a mirror holding structure for a photographic printing apparatus, comprising: a guided member guided along a predetermined guide member; a holder fixed to the guided member to hold the mirror; A rack member fixed to the guided member and formed to extend in the longitudinal direction of the guide member;
It is characterized by being integrally molded.

It is preferable that the rack member has a length equal to or longer than the distance over which the holder slides, and the guided member has a length larger than the rack member.

[0012]

The mirror holding structure for a photographic printing apparatus according to the present invention includes a guided member guided along a guide member, a holder fixed to the guided member, and a guide fixed to the guided member. Since the rack member formed so as to extend in the longitudinal direction of the member is integrally formed, unlike the case where the components are combined, it is easy to obtain relative dimensional accuracy of each part, Further, the high accuracy can be maintained. Further, in the case of a separate member, there is a possibility that the components are peeled off or displaced due to an external force. Further, the number of parts is small and the cost is low.

When the rack member has a length equal to or greater than the distance the holder slides and the guided member has a length larger than the rack member, the guided member has a sufficient length. Can be stably maintained. If the guided portion is short, a mechanism for adjusting the angle of the holder is required, but high accuracy can always be maintained without such an extra mechanism.

[0014]

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

FIGS. 1 and 2 show perspectively only the essential parts of a photographic printing apparatus having a structure substantially similar to that shown in FIG. 7 with a digital kit to which the present invention is applied. It is a schematic front view and a side view. FIG. 3 is an explanatory diagram schematically showing the configuration of the digital kit.

In FIG. 1 to FIG.
FIG. 2 shows a digital image display unit 5 fixedly attached to the front surface of the main body 2 of the photoprinting apparatus 1 including the CRT 4 with the display screen 4a facing upward, and a rail (not shown) fixed to the main body 2. The optical unit 6 is detachably mounted from the front side in the space 6.

The optical unit 6 includes a filter turret 8 having three color filter elements 7R, 7G, and 7B on a rotating plate, and a filter turret 8 including three color filter elements 7R, 7G, and 7B. And a lens 10A, 10B having a horizontal optical axis for forming an image on paper of the image light reflected by the sub-mirror 9 and reflecting the image light transmitted vertically upward in one direction. And a main mirror (optical component) 11 for reflecting image light emitted from one of the lenses 10A and 10B toward paper.

The filter turret 8 converts a red component image, a green component image, and a blue component image, which are monochrome images, sequentially displayed on the display screen 4a of the CRT 4 into three separate images, respectively. It is provided to make an image. The main mirror 11 is
It is provided for switching between film image printing and digital image printing. At the time of film image printing, the main mirror 11 is guided by the rail (guide member) 16 and retreats to the left in FIG. 3 along the horizontal optical axis. The exposure of the film image light passing through the lens 43 to the surface of the paper 44 is allowed.

The two lenses 10A and 10B are composed of, for example, a standard lens and an optional lens.
One of the lenses 10A and 10B is configured to be selectively interposed in the optical path according to the purpose.

The digital image display unit 5 includes:
In order to protect the display screen 4a facing upward from the CRT 4, a shutter 12 covering the display screen 4a when the optical unit 6 is not mounted is provided. The shutter 12 is mechanically opened by a member of the optical unit 6 when the optical unit 6 is inserted into the space, thereby exposing the display screen 4a. Digital image display unit 5
The operation of the optical unit 6 is controlled by the control unit 13.

FIG. 4 is a plan view of the optical unit 6. The main mirror 11 is fixed to a mirror holder 14, and the mirror holder 14 is cross-linked horizontally and horizontally along both side walls extending in the longitudinal direction (the left-right direction in FIG. 4) of the housing 15 of the optical unit 6. Two pipe-shaped rails 1
It is slidably supported on 6,16. In this case, the mirror holder 14 is integrally provided on both sides with support arms (guide members) 14a, 14b supported by the rails 16, 16 with the rails 16, 16 respectively penetrating therethrough. The support arm 14a extends long along the rail 16, and a rack (rack member) 17 is fixed to the support arm portion 14a so as to extend along the longitudinal direction of the rail 16.

On the other hand, a mirror driving motor (DC motor) 19 in which a pinion (gear) 18 meshing with the rack 17 is mounted on a rotating shaft is fixed to the housing 15, and the main mirror 11 is moved by the motor 19. , The video image from the CRT 4 can be moved between an exposure position (the position shown in FIG. 4) for exposing the video image on the paper 44 and a retracted position for allowing the exposure of the film image on the paper 44. I have.

A photoelectric sensor 20 for stopping the main mirror 11 at the exposure position and a microswitch (detection means) 21 for stopping the main mirror 11 at the retracted position are fixed to the housing 15.

In the vicinity of the filter turret 8,
A filter driving motor (pulse motor) 22 and a filter origin detector 23 are provided, and a lens driving mechanism 24 is further provided.

The lens driving mechanism 24 includes the rails 16 and
Rails 25, 2 on two parallel pipe-like rails 25, 25 bridged in a direction orthogonal to 16 and horizontally.
The moving base 26 is slidably supported along the reference numeral 5, and two video image printing lenses 10A and 10B are fixed on the moving base 26.

FIG. 5 is a plan view similar to FIG. 4 showing a perspective view of a main part of the optical unit 6 shown in FIG. Holder 14
A contact portion 52 is protruded from the distal end 30 of the support arm (guided member) 14a. FIG. 5 shows a state in which the mirror 11 has been moved to the most distal position, that is, a position where a digital image can be exposed. The manner in which the mirror 11 is positioned will now be described.

When the DC motor 19 operates, the pinion 18 interlocking with the pinion 18 rotates via the reduction gear and the torque limiter 56 (FIG. 6), and the rack 17 meshing with the pinion 18 is driven. Move in the direction shown. Immediately before the frontmost position shown in FIG. 5, the rib 36 protruding from the end wall 34 of the holder is
Sensor (detection means) provided inside the side wall 38 of the camera
Block 40 light paths. As a result, the photoelectric sensor 40 is activated, and the power supply to the motor 19 is stopped after a predetermined time. During this fixed time, the holder 14 moves in the direction of the arrow R, and the contact portion 52 contacts the receiving portion 54 of the housing 15. The receiving portion 54 is configured so that the position of the receiving portion 54 can be slightly adjusted in the axial direction of the guide rail 16 by loosening the screw 44 and can be fixed by retightening the screw.

The contact portion 52 of the holder 14 is
, The holder 14 stops. At this time, the pinion 18 is kept in a state of continuously biasing the rack in the direction of the arrow R while meshing with the rack 17 by the action of the torque limiter 56 containing the coil spring. As a result, the holder 14 stops at the specified position, and the state is changed to the motor 1 again.
Maintained until 9 is activated. Since the pinion 18 is connected to the motor 19 via the reduction gear, the pinion 18 is prevented from moving even if an external force is applied in the reverse direction, so that the position is reliably maintained.

To return the holder 14 to the original retracted position, the motor 19 is rotated in the reverse direction to move the holder 14 in the direction opposite to the arrow R. When the holder 14 reaches the retracted position, a part of the holder 14 contacts the microswitch 21 shown in FIG. 4, the microswitch 21 operates, and the motor 19 stops.

Behind the holder 14, metal fittings 52a, 52
b and 52 c are fixed by screws 54 and hold the main mirror 11 in the holder 14. The support arm 14a is integrally formed at one end of the holder 14 with plastic such as resin. The rack 17 is provided with the support arm
It is engraved integrally with a. The length of the support arm 14a, that is, the total length L2 of the portion guided by the guide rail 16
Is longer than the length L1 of the rack 17. Support arm 14a
A through hole (not shown) is formed in the guide rail 16.
Is inserted through this through hole.

FIG. 6A is a longitudinal sectional view of the optical unit 6, and FIG. 6B shows the holder 14 and its peripheral parts. (A)
5 shows a state in which the holder 14 is in its use position, that is, a position where a video image can be printed, as in FIG. The light emitted from the CRT 4 is laterally reflected by the sub-mirror 9, further reflected downward by the main mirror 11, and forms an image on the lower paper 44 (FIG. 6A).
The position where the above-mentioned mirror 11 has been moved to the left most and has been retracted from the optical path of the analog image is indicated by a chain-line mirror 11. This state is shown in FIG.

FIG. 3B shows a state in which the holder 14 has moved to the leftmost position in relation to the guide rail 16 and the motor 19. At this time, the pinion 18 is located near the tip of the support arm 14a. Also, the photoelectric sensor 40 and the rib 36 for shielding the photoelectric sensor 40 are clearly shown.

As shown in FIG. 6A, after the mirror 11 is inserted along the inclined groove 56 of the holder 14, it is fixed by the metal fitting 52 described above. As can be seen from FIGS. 5 and 6, the rack 17 is formed slightly longer than the sliding distance of the holder.

As described above, since the holder 14 is stably guided by the sufficiently long support arm 14a, the mirror 11 can always maintain the same angle. now,
If the molding accuracy is the same, if the support arm 14a is short, the mirror cannot be stably maintained at the same angle, so that an angle adjusting means for the mirror 11 is required.

Since the holder 14, the support arm 14a, and the rack 17 are integrally formed, the relative positional relationship is not disturbed as in the case where a single component is combined, so that it is extremely stable. The mounting accuracy of the mirror 11 can be maintained. When positioning the holder 14,
Alternatively, when some other external force is applied, in the case of a combination of single items, there is a possibility that the components are peeled off from each other, but the mirror holding structure of the present invention does not. Furthermore, since the number of parts is small, assembly can be performed easily and at low cost.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing a main part of a photographic printing apparatus equipped with a digital kit according to the present invention.

FIG. 2 is a similar schematic side view of the photographic printing apparatus shown in FIG.

FIG. 3 is an explanatory view schematically showing the configuration of a digital kit.

FIG. 4 is a plan view of an optical unit.

FIG. 5 is a plan view perspectively showing a main part of the optical unit shown in FIG. 4;

6A is a longitudinal sectional view of an optical unit 6, and FIG. 6B is a schematic explanatory view showing a holder and its peripheral parts.

FIG. 7 is a schematic explanatory view of a conventional photographic printing apparatus.

[Explanation of symbols]

 11 Mirror 14 Holder 14a Support arm (guided member) 16 Guide rail (guide member) 17 Rack (rack member)

Claims (2)

[Claims] 1. A mirror holding structure for a photo printing apparatus for holding a mirror used for printing a photograph, wherein the guided member is guided along a predetermined guide member, and is fixed to the guided member. A photographic printing apparatus, wherein a holder for holding the mirror and a rack member fixed to the guided member and formed to extend in a longitudinal direction of the guide member are integrally formed. Mirror holding structure. 2. The apparatus according to claim 1, wherein the rack member has a length equal to or longer than a distance over which the holder slides, and the guided member has a length greater than the rack member.
A mirror holding structure for a photographic printing apparatus according to the above.