JP2518636Y2 - Film unit with lens - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a lens-fitted film unit having three exposure openings (hereinafter referred to as "film unit").

[Conventional technology]

Conventionally, as a shutter for opening and closing a large number of exposure openings,
It is known to be used for a camera in which four exposure openings are arranged in a horizontal row. In this shutter, two large shutter blades each having four openings arranged in a horizontal row are slid in opposite directions using a flywheel and an electromagnetic magnet, and the film is exposed only while the openings of both shutter blades overlap. Is done. By using this, it is possible to record object images with slightly different parallaxes, and it is possible to reproduce a stereoscopic image of the object by a known method such as integral photography.

[Problems to be solved by the device]

According to the above shutter, the exposure time can be adjusted by electrically controlling the sliding speed of the shutter blade, but the shutter blade is inevitably increased in size, and an electromagnetic magnet or a flywheel is used. That is, it cannot be applied to a disposable type film unit having a simplified structure for cost reduction and compactness. As a shutter for such a film unit, a shutter of a type that opens and closes at a constant shutter speed determined by the applied biasing force and the like is sufficient.

[Purpose of device]

It is an object of the present invention to provide a film unit capable of opening and closing three exposure openings by using a compact shutter having a simple structure and capable of picking up object images with different parallaxes little by little.

[Means for solving the problem]

In order to achieve the above-mentioned object, the present invention has a pair of light-shielding portions that respectively open and close two adjacent ones of the three exposure openings arranged in a line, and are rotatable in the middle of these light-shielding portions. A first shutter blade pivotally mounted on the first shutter blade, a second shutter blade pivotally mounted on a plane parallel to the first shutter blade, and one end of one of these shutter blades. And a pin for slot-pin coupling with a slot formed in the other shutter blade, and a biasing member for biasing the first and second shutter blades in the direction in which the exposure opening is closed. In response to the shutter release operation, and by rotating one of the shutter blades from the closed position to the open position against the bias of the biasing member, the other shutter by the pin-slot coupling is provided. Feather The three exposure openings are simultaneously opened by rotating from the same position to the open position, and the respective shutter blades rotated to the open position are returned to the closed position by the urging of the urging member, whereby the three exposures are performed. The subject image is taken through the opening.

[Action]

According to the above, the two interlocking shutter blades rotated in the opening direction by the known release mechanism are
After opening the three exposure openings while resisting the biasing force, the biasing force returns to the initial position to close the exposure openings. At this time, the exposure time has a constant value determined by the urging force applied to the shutter blades, but the exposure timings of the three exposure openings can be made different by changing the shape of the shutter blades. Further, since the shutter blade has a symmetrical shape with respect to the axis, the stroke at both ends of the shutter blade due to rotation is small, which contributes to downsizing of the entire film unit.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

〔Example〕

In FIGS. 2 and 5 showing the film unit 10 embodying the present invention, the three taking lenses 11, 12, and 13 are integrally molded in plastic and incorporated in the lens holder 14. The lens holder 14 is provided with three openings 16, 17, and 18 located behind each photographing lens. The shutter sliding surface 21 formed in the center of the main body 19 having the main structure inside the film unit 10 is provided with openings 22, 23 and 24,
26, 27 and a stop pin 28 are provided. The hole 26 bears the shaft 31 attached to the shutter blade 29, and the hole 27 bears the shaft 33 attached to the shutter blade 32. The stop pin 28 stops the shutter blade 29 in the closed state.

As shown in FIG. 1 (A), a shaft 31 is attached to the central portion of the shutter blade 29, and shield portions 34 and 36 formed at both ends of the shutter blade 29 shield the openings 22 and 23, respectively. . A pin 40 is planted at the rightmost end of the shutter blade 29. A spring 38 hung on the left end portion of the shutter blade 29 urges the shutter blade 29 counterclockwise. The lever 39 protruding from the center of the shutter blade 29 is a release lever.
41 is pushed to the right by the shutter blade 29
Is rotated clockwise. The release mechanism for driving the release lever 41 is the charge lever 42, the winding knob 4
3. A display gear 44 having a numerical value indicating the number of remaining shooting frames, a shooting start mark "S", a winding shaft 46, and the like. As is well known in this release mechanism, when the winding knob 43 is wound after opening and closing the shutter, the release lever 41 is engaged with the step portion 42A of the charge lever 42 to be in the shutter charge state, and the charge lever 42 is pushed by pushing the shutter button 61. Rotate clockwise. As a result, the release lever 41 is driven to push the lever 39 to the right.

The shutter blade 32 disposed next to the shutter blade 29 has a shielding portion 47 for opening and closing the opening 24 at the right end, and a lever 48 at the left end is provided with a slot 49 through which the pin 40 is inserted. . As shown in FIG. 3, the lever 48 forms a step portion 50 for overlapping with the front surface of the shutter blade 29.

At the left end of the main body portion 19, a cartridge storage portion 51 for loading the cartridge 53 is formed. On the other hand, at the right end of the main body portion 19, a film roll storage portion for storing a roll of the film 54 drawn from the cartridge 53.
52 are formed. An opening 57 for exposing the winding knob 43 and a finder eyepiece opening 58 are formed in the rear casing 56 that covers the rear portion of the main body portion 19. A display window 62 for exposing the number of remaining frames and the start mark "S" written on the display gear 44 and a shutter button 61 are provided on the upper surface of the front casing 59 that covers the front portion of the main body 19.
And are formed. On the front surface of the casing 59, openings 63, 64 and 65 for exposing the taking lenses 11 to 13 are formed, and a viewfinder objective opening 67 is formed on them. The film unit 10 is a paper box in the final manufacturing process.
Packaged in 68.

Hereinafter, the operation of the present embodiment having the above-mentioned configuration will be described.

First, the winding knob 43 is rotated to observe that the photographing start mark “S” on the display gear 44 is exposed in the display window 62. In this state, the release lever 41 is engaged with the step portion 42A of the charge lever 42 to complete the shutter charge. Then, when the subject is caught through the viewfinder eyepiece opening 58 and the shutter button 61 is pushed in, the charge lever 42 rotates clockwise, so that the release lever 41 and the stepped portion 41A are disengaged, and the release lever 41 is quickly released. Rotate clockwise.

At this time, as shown in FIG. 1 (A), the release lever 41
As a result, the lever 39 is pushed rightward, and the shutter blade 29 rotates clockwise while resisting the bias of the spring 38. With this rotation, the pin 40 moves in the slot 49 from the right end to the left end, and rotates the shutter blade 32 counterclockwise. When the shield 34 starts opening the opening 22, the shields 36 and 47 simultaneously start opening the openings 23 and 24, respectively. Then, when the shielding portion 34 fully opens the opening 22, at the same time, the shielding portions 36, 4
7 fully opens the openings 23 and 24, respectively, and enters the state shown in FIG. 1 (B). Next, when the shutter blade 29 rotates counterclockwise by the biasing force of the spring 38 and the opening 22 begins to be closed by the shielding portion 34, the shielding portions 36 and 47 simultaneously start closing the openings 23 and 24. At this time, the pin 40 moves in the slot 49 from the left end to the right end. Then, the three openings 22, 23, 24 are simultaneously closed by the shielding portions 34, 36, 47, respectively.
The state shown in FIG. This allows 3 openings 2
From 2,23,24, subject images with slightly different parallax are recorded on the film 54 with the same exposure time. In the state of FIG. 1 (C), the shutter blade 29 comes into contact with the stop pin 28 and the biasing force of the spring 38 acts, so that the shutter blade
The positions of 29 and 32 are fixed as shown.

Next, when the winding knob 43 is wound up, the release lever 41 moves to the left, passes over the lever 39, and enters the state shown in FIG. Similarly, subsequent shooting is performed.

FIG. 4 showing another embodiment of the present invention is a release lever.
Reference numeral 41 denotes a shutter that is driven up and down. The release lever 41 is attached to the claw 101 formed on the left end of the shutter blade 100.
Acts to open and close the three openings.

[Effect of device]

As described above, according to the present invention, since two shutter blades that interlock with each other to open and close three exposure openings by rotating are provided, three exposures are performed using a shutter having a simple structure. It is possible to open and close the opening and shoot a subject image with a little different parallax using a low-cost film unit.

[Brief description of drawings]

FIG. 1 is an operation explanatory view of a shutter incorporated in a film unit embodying the present invention. FIG. 2 is an exploded perspective view of a film unit including the shutter shown in FIG. FIG. 3 is a sectional view of an essential part of the film unit shown in FIG. FIG. 4 is a schematic view of a shutter according to another embodiment of the present invention. FIG. 5 is an external view of the film unit shown in FIG. 10 …… Film unit 22 to 24 …… Aperture 29 …… Shutter blade 31 …… Axis 38 …… Spring.

Claims (1)

(57) [Scope of utility model registration request] 1. A first light-shielding member having a pair of light-shielding portions for respectively opening and closing two adjacent light-exposure apertures of the three light-exposure apertures arranged in a line, the first light-shielding portion being pivotally mounted in the middle of the light-shielding portions. Shutter blades, a second shutter blade pivotally mounted along a plane parallel to the first shutter blade, and one of these shutter blades protruding from the other end. Pin to the slot formed on the shutter blade
A slot-engaged pin and a biasing member that biases the first and second shutter blades in the direction in which the exposure opening is closed are provided, and responds to a shutter release operation to bias the biasing member. By rotating any one of the shutter blades from the closed position to the open position, the other shutter blade is rotated from the closed position to the open position by the pin-slot connection to simultaneously open the three exposure openings. A lens-fitted film unit, wherein each shutter blade that has been opened and rotated to an open position is returned to the closed position by the urging force of the urging member to photograph a subject image through the three exposure openings.