JPH05158147A - Instant camera - Google Patents

Abstract

PURPOSE:To incorporate an automatic focusing device without making the size of a camera body and a lens board large, and almost having a no parallax on a photographic lens, to make assembling easy, and to save manufacturing cost, as well. CONSTITUTION:The lens board freely raising and falling between a raising position for positioning the photographic lens on an optical axis, and a falling position where the photographic lens is housed in the frame of a main body part, is provided on the main body part where a film pack housing chamber is provided. A range-finder and a lens moving mechanism are adjacently provided on the board main body 50 of the lens board. The range-finder is composed of a light projector 58, a photodetector 59, and a range-finding circuit, and the lens moving mechanism is moved to any setting positions of short, middle, and long distance setting positions, with a signal from the range-finding circuit, to advance or retreat a pre-group lens 53 to/from a focusing position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instant camera using a mono-sheet type instant film unit.

[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 a developing roller is developed by a pair of developing rollers while a camera body is discharged from an outlet. The structure is such that it is discharged to the outside. For this reason, the camera body must incorporate a pair of unfolding rollers having a length equal to or greater than the width of the film unit, and in order to reliably drive the unfolding rollers, a high-torque motor or driving force of the motor is required. It is necessary to have a transmission mechanism for transmitting the to the claw and the developing roller.
Also, since the screen size of the film unit is larger than the screen size of a normal 135 film, the focal length of the taking lens becomes long and the thickness of the camera body becomes large in order to be able to shoot at a standard angle of view. The number of camera bodies increases and the size tends to increase.

[0003] Against this background, the instant applicant of the present invention, "Photorama Mr. Handy" 0
It is provided. In this instant camera, as shown in FIG. 5, a strobe device 11 and a shutter release mechanism 12 are arranged on the front side of a film unit 10 which is discharged from a discharge port 9 by a developing roller 8 and a developing roller is driven on the rear side. With respect to the main body portion 15 in which the motor 13 and the main condenser 14 for the flash are arranged, a photographing lens 16 which is a pan focus, a power battery 17, and a lens board 18 incorporating a shutter mechanism and the like are positioned on the optical axis of the photographing lens 16. The camera body when not in use is made compact by having a structure in which the camera body can be raised and lowered between the standing position and the fall position that is stored within the contour of the main body 15.

In order to improve focus accuracy, it is desired that the instant camera described above be provided with an autofocus device. In consideration of this, the lens moving mechanism is arranged near the taking lens of the lens board 18. Further, it is preferable in terms of space to dispose the distance measuring device on the front surface side of the film unit 10 discharged by the developing roller 8, that is, in the vicinity of the strobe device 11.

[0005]

However, since the distance measuring device and the taking lens are separated from each other, the parallax between the optical axes of the projecting and receiving lenses and the taking lens is increased, and the focus accuracy is lowered. May cause Further, since the distance measuring device and the lens moving mechanism are separated, it is necessary to use long lead wires or the like to connect them.
Further, it is necessary to have a structure in which these lead wires are processed so as not to be pinched by the undulation of the lens board.

Further, even if a lens moving mechanism using a motor, a solenoid or the like is incorporated in the lens board, the lens board can be prevented from being upsized if the structure for accommodating the power supply battery is kept in the lens board as in the conventional case. Absent.

The present invention has been made in view of the above background, and an autofocus device is incorporated without increasing the size of the camera body or the lens board and causing parallax to the photographing lens. At the same time, it is an object of the present invention to provide an instant camera which is easy to assemble and saves the manufacturing cost.

[0008]

In order to achieve the above-mentioned object, the present invention has an upright position for positioning a photographing lens on an optical axis with respect to a main body portion provided with a film pack accommodating portion and a contour of the main body portion. It has a lens board that can be raised and lowered between itself and an inclining position, an autofocus mechanism that is composed of a distance measuring mechanism and a lens moving mechanism, and is provided in the vicinity of the taking lens. A storage chamber for the power supply battery is provided on the side surface of the main body, and the storage chamber serves as a support portion on one end side of the grip belt.

[0009]

2 to 4 showing an instant camera using the present invention, the instant camera comprises a main body 20, a lens board 21, and a lens stay 22. An openable / closable loading lid is provided on the back surface of the main body 20, and a film pack (not shown) can be taken in and out by opening the loading lid.

The lens board 21 is rotatably attached to the body portion 20 by a shaft 33, and when not in use, it can be folded so as to cover the front surface of the body portion 20 as shown in FIG. When the lens board 21 is erected, as shown in FIG. 3, the lens stay 22 having the tip attached to the lens board 21 moves around from the back side of the main body portion 20, and the rear end thereof is the lower end portion of the main body portion 20. Locked to hold the lens board 21 in the upright state. The main body 20
And the lens board 21 are connected via a bellows 47. Reference numeral 40 denotes a pin provided at the lower end of the main body portion 20, and reference numeral 42 is engaged with the pin 40 to make the lens stay 2
2 shows a guide groove for guiding the movement of 2.

The lens board 21 is composed of a board main body 50 and a board cover 51. As shown in FIG. 1, the board main body 50 includes a barrier mechanism and front and rear lens groups 53 and 54 for photographing. A lens 35, a circuit board 55 on which a shutter mechanism and a photometric mechanism are mounted, and a circuit board 56 on which an AF mechanism and a lens moving mechanism are provided are incorporated. The taking lens 35 has a single focal point, and focusing is performed by the helicoid mechanism for the rear lens group 5.
4, the front lens group 53 is moved back and forth in the direction of the optical axis 36.

The AF mechanism is an infrared beam (IRE
D) comprises a light projector 58 and a light receiver (PSD) 59 which receives a beam reflected from a subject.
A light projecting lens and a light receiving lens are incorporated on the front surface thereof. An IR filter is incorporated in the portion of the board cover 51 located in front of the light projecting and light receiving lenses.

A distance measuring circuit is mounted on the circuit board 56. This distance measuring circuit operates the lens moving mechanism to at least one of the short distance set position, the medium distance set position, and the long distance set position according to the distance measurement signal obtained from the light receiver 59.

The lens moving mechanism includes two suction type solenoids 60, 61, an interlocking lever 63, and a connecting lever 6.
5 and a compression spring 67. The interlocking lever 63 is attached so as to be rotatable around a shaft 63a, and the solenoids 60 and 6 are provided on both sides of the shaft 63a.
One of the iron cores is engaged. Connection lever 65
Has one end engaged with the interlocking lever 63 and the other end connected to the holding frame 71 of the front group lens 53. Connection lever 6
5 has a protrusion 2 toward a support plate 69 for supporting the same.
Two guide members 65b and 65c are provided at a predetermined interval, and the interval between these guide members 65b and 65c is evenly biased by the spring 67 in the groove 69a of the support plate 69.

The solenoids 60 and 61 are selectively driven by a distance measuring signal from the distance measuring circuit 73 to move the interlocking lever 63 and the connecting lever 65 to either a short distance setting position or a long distance setting position. To move. The spring 67 positions the connecting lever 65 at the intermediate distance set position when the solenoids 60 and 61 are both in the non-driving state.

When the interlocking lever 63 and the connecting lever 65 are moved to either the short distance set position or the long distance set position, the front lens group 53 moves back and forth with respect to the rear lens group 54, and the photographing lens 35 moves. Focus on a near or far range. Further, when the lens moving mechanism is in the standby state, the focus of the taking lens 35 is in the middle distance range. Therefore, when the distance measurement signal obtained from the distance measuring device is in the middle distance range, Neither solenoid 60 nor 61 is driven.

A barrier mechanism composed of a torsion bar 75, a shield plate 64, etc. is provided in the back of the circuit board 56. In this barrier mechanism, one end of the torsion bar 75 is twisted by the main body portion 20 in accordance with the ups and downs of the lens board 21, and the other end is between the position where the shield plate 64 is covered on the front surface of the taking lens 35 and the position where it is retracted. To move.

As described with reference to FIG. 5, the stroboscopic device 11 is arranged on the back side of the light emitting window 25, and the shutter release mechanism 12 is arranged on the back side of the shutter button 27 on the upper surface of the main body portion 20, and the film unit to be ejected. A motor 13 for driving the developing roller and a main capacitor 14 for strobe are arranged on the back side of 10. Deployment roller 8
Is to send out the exposed film unit scraped out by the claw built in the main body part 20 from the discharge port 9 and crush the developing solution pod provided at the front end of the film unit to develop the developing solution. Deployment of. The driving force of the motor 13 is transmitted to the developing roller 8 via the transmission mechanism 19. This transmission mechanism 1
9 also incorporates a claw drive mechanism for operating the aforementioned claw.

Further, as shown in FIGS. 3 and 4, the main body 2
On the left side surface of 0, a storage chamber 72 for storing the power supply battery is provided integrally with the main body unit 20. The storage chamber 72 serves as a support portion at one end of the grip belt 73.

The operation of the above configuration will be described. When the instant camera is not used, the lens board 21 is in the lying position as shown in FIG. 4, and the taking lens 35 is shielded by the shielding plate 64.

Next, when the camera is changed from the non-use state shown in FIG. 4 to the use state shown in FIG. 3, the lock mechanism 44 of the lens stay 22 housed on the back side of the main body 20 is released to remove the lens. Pull up the board 21. As a result, the lens board 21 is in the undulating position. At this time, the lens board 21 rises from the main body portion 20, the barrier is opened by the action of the torsion bar 75, and the photographing lens 35
Is exposed. At this time, since the connecting lever 65 is moved to the medium distance set position by the urging force of the spring 67, the photographing lens 35 is in a state of being focused on the medium distance range.

At the time of use, the lens board 21 is erected as shown in FIG. 3 and framing is performed through the finder optical system. At this time, with the grip belt 73 alone,
When the camera was held, there was no sense of unity between the hand and the camera, and it was not possible to shoot in a stable posture. On the other hand, in the camera of this embodiment, the storage chamber 72 serves as a support portion for the grip belt 73. Therefore, when holding the camera, a sense of unity between the hand and the main body 20 of the camera can be obtained, and the holding property can be improved.

After that, the shutter button 2 is pressed by the photographer.
When 7 is pressed halfway, photometry and distance measurement are performed. Ranging is
The beam projected from the projector 58 is received by the receiver 59,
The lens moving mechanism is moved according to the obtained distance measurement signal.

When the obtained distance measurement signal is in the near or far range, the solenoid 61 is driven. Solenoid 6
When 1 is driven, the interlocking lever 63 rotates about the shaft 63a and slides the connecting lever 65. As a result, the front lens group 53 moves back and forth with respect to the rear lens group 54, and the photographing lens 35 is brought into a state of being focused on a near or far range. After that, when the shutter button 27 is fully pressed, the shutter mechanism operates and photographing is performed. When the obtained distance measurement signal is in the middle distance range, the set position of the lens moving mechanism is always in the middle distance state, and therefore the time for moving the front lens group 53 back and forth to the in-focus position can be saved. , Shutter release can be performed quickly.

In this embodiment, since the distance measuring device is incorporated in the vicinity of the taking lens 35, the parallax correction to the taking lens 35 hardly occurs.

When the motor 13 is driven by the photographing completion signal, the transmission mechanism 19 operates, the developing roller 8 starts to rotate, and the claw operates to scrape the exposed film unit 10 out of the film pack. Then, when the tip of the film unit 10 enters between the developing rollers 8, the film unit 10 is discharged by the pair of developing rollers 8 and the developing solution is developed at the same time. When the developing roller 8 rotates by a certain amount and the rear end of the film unit 10 is fed from the developing roller 8, the motor 1
3 stops. Then, the film unit 10 protruding from the discharge port 9 is taken out, and a photographic image appears on the film unit 10 after an appropriate time has elapsed.

According to the instant camera of the present embodiment, the connecting parts necessary for opening and closing the shield plate 64 are omitted and only the torsion bar 75 is used, so that space saving can be achieved and space saving can be achieved. It was possible to provide a lens moving mechanism and a distance measuring device in the intended portion.

[0028]

As described above, according to the instant camera of the present invention, since the distance measuring means is provided in the vicinity of the taking lens, the focusing accuracy can be improved, and the distance measuring means and the lens moving mechanism are provided. Since they are provided adjacent to each other, they can be installed at a low cost without using long lead wires and the like, and space saving can be further improved. Furthermore, according to the instant camera of the present embodiment, a storage portion for storing the power supply battery is provided in the main body portion, and this portion can be used as the support portion of the grip belt, so that the touch at the time of shutter release is prevented. Has the effect of

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a lens board of an instant camera of the present invention.

FIG. 2 is an exploded perspective view of an instant camera.

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

FIG. 4 is a perspective view showing an unused state of the instant camera.

FIG. 5 is a perspective view showing the instant camera described in the related art, with a part broken away.

[Explanation of symbols]

 8 Deployment Roller 10 Film Unit 20 Main Body 21 Lens Board 35 Photographic Lens 58 Emitter 59 Light Receiver 63 Interlocking Lever 65 Coupling Lever

Claims (2)

[Claims] 1. A lens which can be raised and lowered between a main body portion provided with a film pack storage portion and a standing position for positioning a photographing lens on an optical axis and a fall position stored in the outline of the main body portion. A board, a distance measuring unit provided in the vicinity of the taking lens, and a lens provided adjacent to the distance measuring unit and for moving a focusing lens of the taking lenses according to a signal from the distance measuring unit. An instant camera, characterized in that it is provided with a moving means. 2. The instant camera according to claim 1, wherein a grip belt is provided on a side surface of the main body, and a storage chamber for storing a power supply battery is provided at one end side of the grip belt.