JP2894657B2 - Albada-type inverted Galileo finder and instant camera using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an albada-type inverted Galileo finder and an instant camera using the same.

[0002]

2. Description of the Related Art In an instant camera using a mono-sheet type instant film unit, an exposed film unit is scraped out of a film pack by a claw and discharged out of the camera body while developing solution is developed by a pair of developing rollers. It has a structure to do.
For this reason, a pair of developing rollers having a length longer than the width of the film unit must be built into the camera body, and a high-torque motor or motor driving force must be used to reliably drive the developing rollers. Gear mechanism for transmitting the force to the claw and the developing roller is required. In addition, since the screen size of the film unit is larger than the screen size of a normal 135 film, the focal length of the photographing lens is increased and the thickness of the camera body is increased in order to be able to shoot at a standard angle of view. It is easy to increase the size of the camera body.

[0003] Against this background, the present applicant has provided an instant camera "Photorama Mr. Handy". Since this instant camera is a pan-focus camera, it has a finder configuration consisting solely of an objective lens and an eyepiece. Then, a film path is provided between a discharge port for discharging the developed film unit and the developing roller, an objective lens is disposed on a front side sandwiching the film path, and an eyepiece is disposed on a rear side.
Since the film unit is configured to be discharged through these lenses, the width of the camera body when viewed from the front is compact. When the finder objective lens and the finder eyepiece are arranged so as to sandwich the film passage, the film unit passes through the finder optical system when the film unit is ejected. Is not used, so no inconvenience arises.

In general, a camera incorporating an autofocus device requires a finder having a function of displaying a distance measurement area within a finder field of view.
As such a finder, for example, an Albada-type inverted Galileo finder is used in which a target mark for displaying a distance measurement area is vapor-deposited on an object-side surface of an eyepiece, and the image is reflected by a half mirror so that the image can be observed. Is preferred. In such a camera, it is necessary to make an adjustment for correctly aligning the target mark with the distance measurement area of the autofocus device.

In the case of a conventional camera in which each of an objective lens, a half mirror, and an eyepiece with a target mark constituting an Albada inverted Galileo finder is incorporated in a single holding frame, positioning of each optical component on the holding frame is performed. Is performed to determine the finder optical axis, and then either the eyepiece or the half mirror is moved so that the target mark is located at a predetermined position in the finder field. When the finder unit is incorporated into a camera, the target mark is made to coincide with the distance measurement area by adjusting the movement of the entire holding frame.

[0006]

However, in a camera such as the above-mentioned instant camera in which the finder optical system is divided into two parts, it is very difficult to perform the adjustment work of the entire finder optical system.
In addition, since the target mark is reflected and observed by the half mirror, when the distance measurement area and the target mark are matched, when the movement of either the half mirror or the eyepiece is adjusted, if these change in angle, However, there is a disadvantage that the target mark moves largely in the finder visual field and is difficult to adjust.

The present invention has been made in view of the above background, and when the finder optical is divided into two parts,
An object of the present invention is to provide an Albada-type inverted Galileo finder devised so that parallax adjustment can be performed at low cost, and an instant camera using the same.

[0008]

According to the present invention, there is provided an Albada-type inverted Galileo finder according to claim 1, wherein an objective lens is provided in the Albada-type inverted Galileo finder for displaying a mark in a finder field frame. Has an objective-side holding frame fixed to the camera body, and an eyepiece-side holding frame in which the eyepiece and the mark display component are incorporated.The eyepiece-side holding frame is provided on the camera body. The eyepiece-side holding frame can be moved and adjusted with respect to the objective-side holding frame by providing a locking portion that elastically engages with the supporting member and that is movably engaged in a direction crossing the finder optical axis.

According to a second aspect of the present invention, there is provided an instant camera having a film passage between a developing roller and a discharge port formed in a camera body, wherein an objective lens is incorporated and a camera is provided in front of the film passage. An object-side holding frame fixed to the body, and a component for displaying a mark in the eyepiece lens and the viewfinder field frame are incorporated. An albada-type inverted Galileo finder comprising an eyepiece-side holding frame movably engaged in a direction intersecting the axis is provided.

[0010]

2 and 3, which show an instant camera using the present invention, the instant camera comprises a main body 10, a lens board 11, and a lens stay 12. An openable and closable loading lid is provided on the back surface of the main body 10, and is opened so that a film pack (not shown) can be taken in and out.

[0011] The lens board 11 has a body 1
The main body 10 can be folded so as to cover the front surface of the main body 10 when not in use, as shown in FIG. When the lens board 11 is standing up, as shown in FIG.
2 moves around from the back side of the main body 10, the rear end of which is locked to the lower end of the main body 10, and holds the lens board 11 in an upright state. Reference numeral 13 denotes the main body 1
Reference numeral 14 denotes a pin provided at the lower end of the
3 shows a guide groove which is engaged with the lens stay 3 to guide the movement of the lens stay 12.

The lens board 11 includes a photographing lens 16,
A distance measuring device (not shown) and a shutter device (not shown) are built in. The main body 10 and the lens board 11 are connected via a bellows 17. A discharge port 18 for sending out the exposed film unit to the outside is formed on the upper surface of the main body 10, and a pair of developing rollers 19 and 20 (see FIG. 5) are provided at the back thereof. The developing rollers 19 and 20 send out the exposed film unit scraped out by the claw incorporated in the main body unit 10 to the outside from the discharge port 18 and a developing solution pod provided on the leading end side of the film unit. To develop the processing solution.

A film passage 21 that connects between the discharge port 18 and the developing rollers 19 and 20 is provided on the upper front surface of the main body 10.
Is formed in the elongated partition member 22 formed with. As shown in FIG. 4, a release detecting circuit 24 for electrically detecting the pressing operation of the release button 23 and a strobe light emitter 27 located on the back of the strobe light emission window 26 are provided on the front surface of the partition member 22. I have. A motor 2 for driving the developing rollers 19 and 20 is provided on the rear surface of the partition member 22.
8. A main condenser 29 for strobe light emission is attached.

At the back of the finder window 30 and at the right end of the partition member 22, an object holding frame 33 and an eyepiece holding frame 36 are provided before and after the partition member 22 is interposed therebetween, as shown in FIG. The objective lens 32 is held in the objective holding frame 33,
The eyepiece holding frame 36 holds a half mirror 34 and an eyepiece 35. The film unit includes a film passage 21 provided inside the partition member 22.
Crosses the viewfinder optics by being ejected through. Further, openings 40 and 41 which are partially cut out are provided at portions of the partition wall member 22 facing the finder optical system.
Are provided so as not to obstruct the viewfinder field of view. Furthermore, the film passage 21 is
Light-blocking members 42 and 43 are provided at the exit portion and fixed in a state where they abut against each other without any gap from the front and rear, respectively, to prevent light from entering from outside.

The objective holding frame 33 formed integrally with the partition member 22 has upper and lower holes 33a and 33b, respectively.
The locking claws 32a, 32b provided on the objective lens 32 are inserted into these holes 33a, 33b, and the objective lens 32 is fixed. The eyepiece holding frame 36 is provided with holes into which locking claws provided on the half mirror and the eyepiece lens are inserted before and after, and the half mirror 34 and the eyepiece 35 are held by engagement of these. The eyepiece holding frame 36 holding the half mirror 34 and the eyepiece 35 is attached to the back surface of the partition member 22.

As shown in FIG. 1, the eyepiece holding frame 36 is integrally formed of plastic, and has cutouts 45 and 46 at the upper and lower sides of the front surface thereof. Bridge pieces 47 and 48 that are bent so as to protrude forward are integrally provided on the front surfaces of these notches 45 and 46. These bridge pieces 47 and 48 are elastically deformed when receiving a pressing force from the front. A locking claw 49 is provided at a central portion of the bridge piece 47 so as to protrude upward while being slightly inclined forward.
A locking claw 50 is provided at a central portion of each of them, which protrudes downward while being slightly inclined forward.

On the back side of the partition member 22, support plates 53 and 54 are provided, respectively, projecting in parallel with the finder optical axis 51. The supporting plates 53, 54 are provided with locking holes 56, 57 into which the locking claws 49, 50 are inserted, and support the eyepiece holding frame 36 via the locking claws 49, 50 and the bridge pieces 47, 48. I do. The vertical distance between the support plates 53 and 54 is the same as the length obtained by adding the height of the locking portion 49 to the height of the eyepiece holding frame 36, and the locking holes 56 and 57 are provided.
Is formed slightly larger than the size of the locking claws 49 and 50. Further, the support plates 53 and 54 are provided with an insertion path 60 for guiding the locking claw 50 from outside to the locking hole 57.

The operation of the above configuration will be briefly described. The lens board 11 and the lens stay 12 are attached to the main body 10, and the eyepiece holding frame 36 in which the half mirror 34 and the eyepiece 35 are assembled is attached to the back surface of the partition member 22. In this attachment, the locking claw 50 of the eyepiece holding frame 36 is inserted along the insertion path 60, and the locking claw 50 is moved to the position of the locking hole 57. As a result, the locking claws 49, 50 are aligned with the positions of the locking holes 56, 57, and by slightly shifting the eyepiece holding frame 36 upward, the locking claws 49, 50 are fitted into the locking holes 56, 57, respectively. Get stuck. As a result, the front surface of the eyepiece holding frame 36 comes into contact with the rear surface of the partition member 22, and light does not enter the finder optical system.

Further, when the eyepiece holding frame 36 is slightly moved with the locking claws 49, 50 fitted in the locking holes 56, 57, the locking claws 49, 50 are inclined forward. Therefore, there is a possibility that the locking claws 49 and 50 may operate in the escape direction from the locking holes 56 and 57, and the eyepiece holding frame 36 may be displaced.
Since the eyepieces 7 and 48 are absorbed, the eyepiece holding frame 36 is held as it is, and there is no problem even if the hand is released.

Thereafter, a parallax adjustment operation is performed. In this adjustment, the instant camera is fixed at a position separated by a predetermined distance from the parallax adjustment chart, the chart is viewed from the eyepiece 35, and the target mark displayed in the viewfinder matches the distance measurement area provided in the chart. If not, the eyepiece holding frame 36 is moved up, down, left, and right with respect to the finder optical axis 51 to align the target mark with the distance measurement area. At this time, the adjustment method in which the eyepiece lens 35 and the half mirror 34 are integrally moved is much larger than the adjustment method in which one of the eyepiece lens 35 and the half mirror 34 is moved. Since there is no such operation, the alignment work becomes easy. After the adjustment is completed, the partition member 2
The eyepiece holding frame 2 and the eyepiece holding frame 36 are securely fixed by applying an adhesive or the like.

Although the present invention has been described with reference to the illustrated embodiment, the Albada inverted Galileo finder of the present invention is not limited to the above embodiment. For example, the field frame and the target mark may be formed on a glass plate. A configuration in which the glass plate is vapor-deposited and the glass plate is incorporated in an eyepiece holding frame may be used. Further, in the present embodiment, the finder optical system is divided into two by providing a film passage in the finder optical system. However, the present invention is not limited to this. For example, a lens movement for changing the image magnification in the finder optical system is performed. Needless to say, the present invention can be applied to a camera in which a finder optical system is divided into front and rear parts by providing a path.

[0022]

As described above, according to the albada-type inverted Galileo finder of the present invention, an eyepiece in which a supporting portion is provided on a camera body to which an object side holding frame is fixed, and a locking portion is provided for the supporting portion. Since the side holding frame can be locked so that it can be moved and adjusted, for example, the adjustment of parallax and the like becomes easy, and the cost of production equipment can be reduced without the need for a separate jig or the like for adjustment.

Further, according to the instant camera of the present invention, the parallax can be easily adjusted even if the finder optical system is divided into two by the film path. Furthermore, the compactness of the camera body can be achieved, and the portability of the instant camera can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a locking claw of an eyepiece holding frame and a locking hole of a partition member according to the present invention.

FIG. 2 is a perspective view showing a use state of the instant camera.

FIG. 3 is a perspective view showing a non-use state of the instant camera.

FIG. 4 is a perspective view showing a main body of the instant camera, with a part cut away.

FIG. 5 is a sectional view of a finder section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Main body part 11 Lens board 19, 20 Deployment roller 21 Film passage 22 Partition member 32 Objective lens 33 Object holding frame 34 Half mirror 35 Eyepiece 36 Eyepiece holding frame 47, 48 Bridge piece 49, 50 Locking claw 56, 57 Lock hole

Claims (2)

(57) [Claims] 1. An Albada inverted Galileo finder for displaying a mark in a viewfinder field frame, in which an objective lens is incorporated and an objective-side holding frame fixed to a camera body, an eyepiece and components for displaying the mark are incorporated. Eyepiece-side holding frame, and the eyepiece-side holding frame is provided with a locking portion that elastically engages with a support member provided on the camera body and that is movably engaged in a direction intersecting with the finder optical axis. An albada-type inverted Galileo finder, wherein the eyepiece-side holding frame can be moved and adjusted with respect to the object-side holding frame. 2. An instant camera having a film passage between a developing roller and a discharge port formed in a camera body, wherein an objective lens is incorporated, and an object-side holding frame fixed to a camera body at a front surface of the film passage. And a part for displaying a mark in the eyepiece lens and the viewfinder field frame are incorporated, and the support part provided on the camera body is elastically moved on the back side of the film passage in a direction intersecting the viewfinder optical axis. An instant camera characterized by having an Albada inverted Galileo finder comprising an eyepiece-side holding frame freely engaged.